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/poynt"set'/, adj. Typesetting. (of spaces) cast in widths that conform to standard point measure. * * *
point-shav·ing (pointʹshā'vĭng) n. The illegal practice of deliberately limiting the number of points scored by one's team in an athletic contest, as in return for a payment ...
/poynt"teuh poynt"/, n. a cross-country horse race between specified points, in which each rider is often free to select his or her own course between the points. [1880-85] * * ...
/poyn"tl/, n. pointel. * * *
point defect n. A departure from symmetry in the alignment of atoms in a crystal that affects only one or two lattice sites. * * *
Fr. /pwaonnt/, n., pl. pointes Fr. /pwaonnt/. Ballet. 1. the tip of the toe. 2. a position on the extreme tips of the toes. [1820-30; < F: pointe (du pied) tiptoe, lit., ...
Pointe Claire
/poynt' klair"/; Fr. /pwaonnt klerdd"/ a city in S Quebec, in E Canada, near Montreal, on the St. Lawrence. 24,571. * * *
Fr. /pwaonn tann pee"trddeu/, n. a seaport on central Guadeloupe, in the E West Indies. 50,000. * * * ▪ Guadeloupe  principal town and arrondissement of the French overseas ...
Fr. /pwaonn toh trddahonn"bleu/, n. a city in S Quebec, in E Canada, N of Montreal, on the St. Lawrence. 36,270. * * *
Fr. /pwaonnt nwannrdd"/, n. a seaport in the S Republic of Congo. 141,700. * * * City (pop., 1992 est.: 576,206) and port, southwestern Republic of the Congo. It was the ...
Pointeaux Trembles
Pointe aux Trem·bles (pwăɴt ōträɴʹblə) A city of southern Quebec, Canada, a residential suburb of Montreal on northeast Montreal Island. Population: 36,270. * * *
—pointedly, adv. —pointedness, n. /poyn"tid/, adj. 1. having a point or points: a pointed arch. 2. sharp or piercing: pointed wit. 3. having direct effect, significance, or ...
pointed arch
an arch having a pointed apex. [1740-50] * * *
See pointed. * * *
See pointedly. * * *
/poyn"tl/, n. a pavement of tile mosaic forming an abstract design. Also, pointal, poyntell, poyntill. [1250-1300; ME: stylus, pencil, pointed instrument < OF: point of a spear ...
pointelle [poin tel′] n. a lacy, openwork fabric, often of acrylic, used for blouses, sweaters, etc. * * *
/poyn"teuhr/, n. 1. a person or thing that points. 2. a long, tapering stick used by teachers, lecturers, etc., in pointing things out on a map, blackboard, or the like. 3. the ...
Pointer Sisters, the
▪ American vocal group       American vocal group that scored a string of pop, dance, and urban contemporary (urban contemporary music) hits in the 1970s and '80s. The ...
Pointer, June
▪ 2007       American singer (b. Nov. 30, 1953, Oakland, Calif.—d. April 11, 2006, Santa Monica, Calif.), formed the successful pop group the Pointer Sisters with her ...
pointe shoe n. See toe shoe. * * *
point guard n. Basketball A guard who runs the team's offense, usually from the point. * * *
Fr. /pwaonn tee yay"/, adj. (of book covers) decorated with a tooled pattern of dots. [1900-05; < F, ptp. of pointiller to dot, POINT] * * *
—pointillist, n., adj. /pwan"tl iz'euhm, -tee iz'-, poyn"tl iz'-/, n. (sometimes cap.) a theory and technique developed by the neo-impressionists, based on the principle that ...
See pointillism. * * *
/pwan'tl is"tik, -tee is"-, poyn'tl is"-/, adj. 1. pertaining to or characteristic of pointillism or pointillists. 2. made up of or using minute details; particularized; ...
/poyn"ting/, n. (in masonry) mortar used as a finishing touch to brickwork. [1835-45; POINT + -ING1] * * * ▪ brickwork       in building maintenance, the technique of ...
point·ing device (poinʹtĭng) n. Computer Science An input device, such as a mouse, joystick, or trackball, with which one can move or manipulate a cursor or pointer on a ...
point lace n. See needlepoint. * * *
—pointlessly, adv. —pointlessness, n. /poynt"lis/, adj. 1. without a point: a pointless pen. 2. blunt, as an instrument. 3. without force, meaning, or relevance: a pointless ...
See pointless. * * *
See pointlessly. * * *
point man n. 1. A soldier who is assigned to a position some distance ahead of a patrol as a lookout. 2. A man who has a crucial, often hazardous role in the forefront of an ...
point mutation n. A mutation that changes only one small area or one nucleotide in a gene. * * *
pointof accumulation
point of accumulation n. See limit. * * *
pointof honor
point of honor n. pl. points of honor A matter that affects one's honor or reputation. * * *
pointof no return
point of no return n. pl. points of no return 1. The point in a course of action beyond which reversal is not possible. 2. The point in the flight of an aircraft beyond which ...
pointof order
point of order n. pl. points of order A question as to whether the present proceedings are in order or allowed by the rules of parliamentary procedure. * * *
pointof sale
point of sale n. pl. points of sale A business or place where a product or service can be purchased. Also called point of purchase.   point'-of-saleʹ (point'əv-sālʹ) adj. * ...
pointof view
point of view n. pl. points of view 1. A manner of viewing things; an attitude. 2. a. A position from which something is observed or considered; a standpoint. b. The attitude or ...
/poynts"meuhn/, n., pl. pointsmen. Brit. 1. a railway switchman. 2. a police officer who directs traffic, as at an intersection. [1840-50; POINT + -S3 + MAN1] * * *
point source n. A source, especially of pollution or radiation, occupying a very small area and having a concentrated output. * * *
point spread n. See spread. * * *
Point Success A peak, 4,318.2 m (14,158 ft) high, in the Cascade Range of west-central Washington near Mount Rainier. * * *
point system n. 1. A system of evaluating academic achievement based on grade points. 2. Any of various printing or writing systems for the blind, such as Braille, that use an ...
/poynt"wuyz'/, adj. Math. occurring at each point of a given set: pointwise convergence. [1535-45; POINT + -WISE] * * *
point woman n. A woman who has a crucial, often hazardous role in the forefront of an enterprise: “They are the point men and women in the industry's drive to sell wine” (New ...
/poyn"tee/, adj., pointier, pointiest. having a comparatively sharp point: The elf had pointy little ears. [1635-45; POINT + -Y1] * * *
☆ pointy-head [point′ē hed΄ ] n. Informal an intellectual regarded disparagingly, as being impractical, officious, pedantic, etc. pointy-headed adj. * * * point·y-head ...
—pointy-head, n. /poyn"tee hed'id/, adj. Slang (disparaging). 1. stupid; idiotic. 2. intellectual, esp. in a self-important or impractical way. [1970-75, Amer.] * * *
/pwah ray"/; Fr. /pwann rdde"/, n. Paul /pawl/, 1879-1944, French fashion designer. * * *
Poiret, Jean
▪ French actor and playwright original name  Jean-gustave Poiré   born Aug. 17, 1926, Paris, France died March 14, 1992, Paris       French actor and playwright who ...
Poiret, Paul
born April 20, 1879, Paris, Fr. died April 30, 1944, Paris French fashion designer. After working in the Parisian fashion house of Charles Frederick Worth, he opened his own ...
a Belgian detective who appears as a character in many of the mystery novels by Agatha Christie. He has a very neat appearance and a neat pointed moustache. He often considers ...
poise1 /poyz/, n., v., poised, poising. n. 1. a state of balance or equilibrium, as from equality or equal distribution of weight; equipoise. 2. a dignified, self-confident ...
/poyzd/, adj. 1. (of a person) composed, dignified, and self-assured. 2. being in balance or equilibrium: a balloon poised on the nose of a seal. 3. teetering or wavering: to be ...
/poy"zeuhr/, n. 1. a person or thing that poises. 2. Obs. halter2. [1375-1425 late ME; see POISE1, -ER1] * * *
Poiseuille's law
/pwah zweez"/, Physics, Mech. the law that the velocity of a liquid flowing through a capillary is directly proportional to the pressure of the liquid and the fourth power of the ...
Poiseuille, Jean-Louis-Marie
▪ French physician born April 22, 1799, Paris, France died Dec. 26, 1869, Paris       French physician and physiologist who formulated a mathematical expression for the ...
/poy"sheuh/, n., pl. poisha. an aluminum coin and monetary unit of Bangladesh, the 100th part of a taka. Also called paisa. * * *
—poisoner, n. —poisonless, adj. —poisonlessness, n. /poy"zeuhn/, n. 1. a substance with an inherent property that tends to destroy life or impair health. 2. something ...
poison bean
1. Also called bladderpod. a tall plant, Glottidium vesicaria, of the legume family, native to the southeastern U.S., having clusters of yellow flowers and pods containing highly ...
poison dogwood
☆ poison dogwood n. POISON SUMAC * * *
poison dogwood.
See poison sumac. [1805-15, Amer.] * * *
poison frog
▪ amphibian also called  poison dart frog  or  poison arrow frog   any of approximately 180 species of New World frogs (frog) characterized by the ability to produce ...
poison gas
any of various toxic gases, esp. those used in chemical warfare to kill or incapacitate on inhalation or contact, as phosgene, chlorine, etc. [1910-15] * * *
poison haw
a shrub, Viburnum molle, of the central U.S., having white flowers and bluish-black fruit. * * *
poison hemlock
hemlock (defs. 1, 3). [1810-20, Amer.] * * * Any of several poisonous herbaceous plants of the parsley family, especially Conium maculatum, believed to be the plant that killed ...
poison ivy
1. a vine or shrub, Rhus radicans, having trifoliate leaves and whitish berries and causing severe dermatitis when touched by persons sensitive to it. 2. See poison oak. 3. the ...
poison oak
either of two shrubs, Rhus toxicodendron, of the eastern U.S., or R. diversiloba, of the Pacific coast of North America, resembling poison ivy and causing severe dermatitis when ...
poison pill
1. a pellet of a quick-acting poison, as cyanide, for a spy to carry in order to commit suicide when faced with capture or torture. 2. Financial Slang. any of various business ...
poison sumac
a shrub or small tree, Rhus vernix (or Toxicodendron vernix), of swampy areas of the eastern U.S., having pinnate leaves and causing severe dermatitis when touched by persons ...
poi·son-ar·row frog (poiʹzən-ărʹō) n. Any of several small, often brightly colored terrestrial frogs that inhabit the rain forests of Central and South America and secrete ...
/poy"zeuhn pen"/, adj. 1. composed or sent maliciously, as a letter, usually anonymously and for the purpose of damaging another's reputation or happiness: The newspaper received ...
poi·son-pen letter (poiʹzən-pĕnʹ) n. A usually anonymous letter or note containing abusive or malicious statements or accusations about the recipient or a third party. * * *
See poison. * * *
poison gas n. A gas or vapor used especially in chemical warfare to injure, disable, or kill upon inhalation or contact. * * *
poison hemlock n. A deadly poisonous European plant (Conium maculatum) widely naturalized in North America, having bipinnately compound leaves and compound umbels of small white ...
/poy"zeuh ning/, n. Pathol. the condition produced by a poison or by a toxic substance. [1400-50; late ME poisenynge. See POISON, -ING1] * * *
poison ivy n. In both senses also called poison oak. 1. A North American shrub or vine (Toxicodendron radicans syn. Rhus radicans) that has compound leaves with three leaflets, ...
poison oak n. 1. Either of two shrubs, Toxicodendron toxicarium (syn. Rhus toxicodendron) of the southeast United States or T. diversilobum (syn. R. diversiloba) of western North ...
—poisonously, adv. —poisonousness, n. /poy"zeuh neuhs/, adj. 1. full of or containing poison: poisonous air; a poisonous substance. 2. harmful; destructive: poisonous to ...
See poisonous. * * *
See poisonously. * * *
poison pill n. Informal A plan or tactic intended to make a hostile corporate takeover prohibitively expensive, as one in which a company's stockholders are offered shares of ...
Poisons, Affair of the
▪ French history       one of the most sensational criminal cases of 17th-century France. In 1679 an inquiry revealed that nobles, prosperous bourgeois, and the common ...
poison sumac n. 1. A shrub (Toxicodendron vernix syn. Rhus vernix) typically of swampy habitats in eastern North America, having compound leaves and greenish-white berries and ...
/poy"zeuhn wood'/, n. a tree, Metopium toxiferum, of southern Florida, that has compound leaves and yellowish, berrylike fruits and is poisonous to touch. Also called poison ...
Poisson distribution
/pwah sohn"/; Fr. /pwann sawonn"/, Statistics. a limiting form of the binomial probability distribution for small values of the probability of success and for large numbers of ...
Poisson's ratio
Physics. the ratio, in an elastic body under longitudinal stress, of the transverse strain to the longitudinal strain. Also, Poisson ratio. [1925-30; see POISSON DISTRIBUTION] * ...
Poisson's spot
▪ diffraction also called  Arago's spot        diffraction pattern produced by a small spherical object in the path of parallel light rays. French physicist ...
Poisson, Siméon-Denis
▪ French mathematician born June 21, 1781, Pithiviers, France died April 25, 1840, Sceaux  French mathematician known for his work on definite integrals, electromagnetic ...
Pois·son distribution (pwä-sôɴʹ) n. Statistics A probability distribution which arises when counting the number of occurrences of a rare event in a long series of ...
▪ France       town, Yvelines département, Île-de-France région, north-central France, on the Seine River. It contains the 12th-century collegiate church of Notre ...
(1927– ) one of the first African-American actors to play important film roles. He won an Oscar for his part in Lilies of the Field (1963) and received another for lifetime ...
Poitier, Sidney
born Feb. 20, 1927?, Miami, Fla., U.S. U.S. actor. He was raised in The Bahamas, then studied and acted with the American Negro Theatre in New York City. He made his film debut ...
Poi·tier (pwäʹtyā), Sidney. Born 1927. American actor and director whose film credits include The Defiant Ones (1958) and Lilies of the Field (1963), for which he won an ...
/pwann tyay"/, n. a city in and the capital of Vienne, in W France: Roman ruins; battles A.D. 507, 732, 1356. 85,466. * * * ▪ France       city, capital of Vienne ...
Poitiers, Battle of
(September 19, 1356) Catastrophic defeat of the French king John II in the Hundred Years' War between France and England. English troops under Edward the Black Prince were under ...
Poitiers, University of
▪ university, Poitiers, France French  Université De Poitiers,         coeducational, autonomous state institution of higher learning in Poitiers, Fr. Founded in ...
/pwann tooh"/, n. 1. a region and former province in W France. 2. Gate of, a wide pass near Poitiers. * * * Historical region, western central France. It was bounded by ...
Poitou-Charentes [pwȧ to͞oshə ränt′] metropolitan region of W France: 9,965 sq mi (25,809 sq km); pop. 1,595,000; chief city, Poitiers * * * ▪ region, France  région ...
Poivre, Pierre
▪ French trader born Aug. 23, 1719, Lyon, Fr. died June 6, 1786, near Lyon       French missionary-turned-entrepreneur whose enthusiasm for trade with Indochina ...
/poh kahl"/, n. a large German standing cup of silver, glass, or other material. [1865-70; < G < It boccale drinking-vessel < LL baucalis vessel used to cool wine < Gk ...
poke1 —pokable, adj. /pohk/, v., poked, poking, n. v.t. 1. to prod or push, esp. with something narrow or pointed, as a finger, elbow, stick, etc.: to poke someone in the ...
poke bonnet
poke bonnet n. a bonnet with a projecting front brim * * * ▪ clothing  hood-shaped hat tied under the chin, with a small crown at the back and a wide projecting front brim ...
poke check
Ice Hockey. an attempt to deprive an opponent of the puck by pushing it away with one's stick. Cf. check1 (def. 42). [1940-45] * * *
See poke check. * * *
/pohk"ber'ee, -beuh ree/, n., pl. pokeberries. 1. the berry of the pokeweed. 2. the plant. [1765-75, Amer.; POKE4 + BERRY] * * *
poke check n. A check in ice hockey in which a defender uses the blade of the stick to push the puck off the stick of an opponent.   pokeʹ-check' (pōkʹchĕk') v. * * *
/pohk"loh'geuhn/, n. Northeastern U.S. marshy or stagnant water that has branched off from a stream or lake. Also, pokeloken /pohk"loh'keuhn/. Also called logan. [1840-50 ...
▪ electronic game   electronic game series from Nintendo (Nintendo console) that debuted in Japan in 1995 and later became wildly popular in the United States. The series, ...
poker1 /poh"keuhr/, n. 1. a person or thing that pokes. 2. a metal rod for poking or stirring a fire. [1525-35; POKE1 + -ER1] poker2 /poh"keuhr/, n. a card game played by two or ...
poker dice
1. dice that, instead of being marked with spots, carry on their faces a picture or symbol representing the six highest playing cards: ace, king, queen, jack, ten, nine. 2. any ...
poker face
—poker-faced, adj. 1. an expressionless face: He can tell a funny story with a poker face. 2. a person who has or deliberately assumes a poker face: It is impossible to tell ...
Poker Fever
▪ 2006       By 2005 the disreputable image of card hustlers, seedy card rooms, hard liquor, and concealed pistols long associated with the game of poker had been ...
Poker odds
▪ Table Poker odds poker hand number of ways the hand can be made approximate odds of getting the hand in five cards royal flush 4 1 in 649,740.00 straight flush 36 1 in ...
poker plant
tritoma. * * *
poker face n. A face lacking any interpretable expression, as that of an expert poker player.   pokʹer·faced' (pōʹkər-fāst') adj. * * *
See poker face. * * *
☆ pokeroot [pōk′ro͞ot΄ ] n. POKEWEED * * * poke·root (pōkʹro͞ot', -ro͝ot') n. See pokeweed. * * *
poke sal·lit (sălʹĭt) n. Chiefly Southern U.S. Greens of the wild pokeweed eaten boiled.   [Variant of poke salad.] * * *
/pohk"weed'/, n. a tall herb, Phytolacca americana, of North America, having juicy purple berries and a purple root used in medicine, and young edible shoots resembling ...
/poh"kee/, adj. pokier, pokiest, n., pl. pokeys. poky. * * *
See poky1. * * *
See pokily. * * *
Pokorny, Julius
▪ European linguist born June 12, 1887, Prague, Austria-Hungary [now in Czech Republic] died April 8, 1970, Zürich, Switz.       European linguist known for his work ...
Pokrovsky, Mikhail Nikolayevich
▪ Soviet historian born Aug. 17 [Aug. 29, New Style], 1868, Moscow, Russia died April 10, 1932, Moscow       Soviet historian and government official, one of the most ...
—pokily, adv. —pokiness, n. /poh"kee/, adj., pokier, pokiest, n., pl. pokies. adj. Informal. 1. puttering; slow; dull: poky drivers. 2. (of a place) small and cramped: a poky ...
/pol/, n. Informal. a politician, esp. one experienced in making political deals, exchanging political favors, etc. [1940-45; by shortening] * * *
petroleum, oil, and lubricants. * * *
Pol Pot
orig. Saloth Sar born May 19, 1925/28, Kompong Thom province, Cambodia died April 15, 1998, near Anlong Veng Prime minister of Cambodia. He joined the anti-French resistance ...
1. Poland. 2. Also, Pol Polish. * * *
1. political. 2. politics. * * *
Pol. Econ.
political economy. Also, pol. econ. * * *
/poh"leuh/; It. /paw"lah/, n. 1. Pula. 2. a female given name. * * *
▪ people       member of the westernmost Slavs of Europe who dwelt in medieval times in the territory surrounded by the lower Elbe River in the west, the Baltic Sea in ...
/poh lah"bee euhn, -lay"-/, n. 1. a member of a Slavic people who once lived in the Elbe River basin and on the Baltic coast of northern Germany. 2. the extinct Slavic language ...
/poh"lahk, -lak/, n. Slang (disparaging and offensive). a Pole or person of Polish descent. [1590-1600; < Pol polak a Pole] * * *
Polanco, Jesus de
▪ 2008 Jesús de Polanco Gutiérrez        Spanish media mogul born Nov. 7, 1929, Madrid, Spain died July 21, 2007, Madrid cofounded Spain's most popular daily ...
/poh"leuhnd/, n. a republic in E central Europe, on the Baltic Sea. 38,700,291; ab. 121,000 sq. mi. (313,400 sq. km). Cap.: Warsaw. Polish, Polska. * * * Poland ...
Poland China
one of an American breed of black hogs having white markings. [1875-80, Amer.] * * *
Poland, flag of
▪ Flag History       horizontally divided white-red national flag. It has a width-to-length ratio of 5 to 8.       The first recorded use of the coat of arms ...
Poland, partitions of
(1772, 1793, 1795) Territorial divisions of Poland by Russia, Prussia, and Austria that progressively reduced its territory until it ceased to exist as a state. In the First ...
Poland China n. Any of a breed of large black-and-white hogs developed in North America. * * *
Polanski, Roman
born Aug. 18, 1933, Paris, France Polish-French film director. He grew up in Poland and survived a traumatic wartime childhood under the Nazis. His first feature film, Knife in ...
Polanyi, John C.
▪ Canadian chemist and educator in full  John Charles Polanyi   born Jan. 23, 1929, Berlin, Ger.       chemist and educator who, with Dudley R. Herschbach ...
Polanyi, Karl
▪ Hungarian politician in full  Karl Paul Polanyi   born Oct. 25, 1886, Vienna, Austria died April 23, 1964, Pickering, Ont., Can.       economic anthropologist and ...
/poh"leuhr/, adj. 1. of or pertaining to the North or South Pole. 2. of or pertaining to the pole of any sphere, a magnet, an electric cell, etc. 3. opposite in character or ...
polar air mass
      air mass that forms over land or water in the higher latitudes. See air mass; front. * * *
polar angle
Math. See under polar coordinates. * * *
polar anticyclone
▪ meteorology       wind system associated with a region in which high atmospheric pressure develops over or in the vicinity of the poles. The polar anticyclone is ...
polar axis
Math. the fixed line, usually horizontal, from which the angle made by the radius vector is measured in a polar coordinate system. [1890-95] * * *
polar bear
a large white bear, Ursus maritimus, of the arctic regions. [1775-85] * * * White semiaquatic bear (Ursus maritimus) found throughout Arctic regions, generally on drifting ...
Polar Bear Provincial Park
▪ park, Ontario, Canada       wilderness park, northern Ontario, Canada, on Hudson and James bays. A huge undeveloped area of 9,300 square miles (24,087 square km), it ...
polar body
Cell Biol. one of the minute cells arising from the unequal meiotic divisions of the ovum at or near the time of fertilization. [1885-90] * * *
polar cap
1. Geol. the icecap situated at either end of the earth's poles. 2. Astron. either of the two bright areas around the poles of the planet Mars, consisting of water ice and frozen ...
polar circle
either the Arctic or the Antarctic Circle. [1545-55] * * *
polar continental
polar continental n. a type of cold, dry air mass originating at high latitudes over land areas: see AIR MASS * * *
polar coordinates
Math. a system of coordinates for locating a point in a plane by the length of its radius vector and the angle this vector makes with the polar axis (polar angle). [1810-20] * * ...
polar distance
Astron. codeclination. [1810-20] * * *
polar ecosystem
Introduction       complex of living organisms in polar regions such as polar barrens and tundra.  Polar barrens and tundra are found at high latitudes on land ...
polar equation
Math. an equation in which the variables are polar coordinates. [1840-50] * * *
polar front
Meteorol. the variable frontal zone of middle latitudes separating air masses of polar and tropical origin. [1915-20] * * *
polar lights
the aurora borealis in the Northern Hemisphere or the aurora australis in the Southern Hemisphere. * * *
polar maritime
polar maritime n. a type of cold, wet air mass originating at high latitudes over ocean areas: see AIR MASS * * *
polar molecule
a molecule in which the centroid of the positive charges is different from the centroid of the negative charges. Also called dipole. * * *
polar motion
▪ geophysics       a periodic rotation of the Earth's spin axis about a mean axis, somewhat like the wobble of a spinning top. Slight variations in latitude and ...
polar nucleus
Bot. either of two female haploid nuclei, in the embryo sac of flowers, that fuse to produce a diploid nucleus, which combines with a male nucleus to form the ...
polar opposition
Ling. the relation between a pair of antonyms that denote relatively higher and lower degrees of a quality with respect to an explicit or implicit norm rather than absolute ...
polar orbit
a spacecraft orbit that passes over, or close to, the geographic poles of the earth or some other celestial body. [1960-65] * * *
polar outbreak
Meteorol. a vigorous thrust of cold, polar air across temperate regions. * * *
Polar Regions
the regions within the Arctic and Antarctic circles. * * *
polar valence
Chem. electrovalence (def. 1). * * *
polar wandering
Migration of the magnetic poles of the Earth through geologic time. Scientific evidence indicates that the magnetic poles have slowly and erratically wandered across the surface ...
polar angle n. The angle formed by the polar axis and the radius vector in a polar coordinate system. * * *
polar axis n. The fixed reference axis from which the polar angle is measured in a polar coordinate system. * * *
polar bear n. A large, white-furred bear (Ursus maritimus or Thalarctos maritimus) living in Arctic regions. Also called white bear. * * *
polar body n. A minute cell produced and ultimately discarded in the development of an oocyte, containing little or no cytoplasm but having one of the nuclei derived from the ...
polar cap n. 1. a. Either of the regions around the poles of the earth that are permanently covered with ice. b. A high-altitude icecap. 2. Astronomy. Either of the regions ...
polar circle n. 1. The Arctic Circle. 2. The Antarctic Circle. * * *
polar coordinate The polar coordinates of point P are (r,θ). Clarinda/Academy Artworks n. Either of two coordinates, the radius or the polar angle, that together specify the ...
polar front n. The region or boundary separating air masses of polar origin from those of tropical or subtropical origin. * * *
/peuh lahr"ee, paw-/, n. a distinctive English argot in use since at least the 18th century among groups of theatrical and circus performers and in certain homosexual ...
/poh'leuh rim"i teuhr/, n. Optics. 1. an instrument for measuring the amount of light received from a given source as a function of its state of polarization. 2. a form of ...
See polarimeter. * * *
See polarimetric. * * * ▪ chemistry       in analytic chemistry, measurement of the angle of rotation of the plane of polarized light (that is, a beam of light in which ...
/poh lair"is, -lar"-, peuh-/, n. 1. Astron. the polestar or North Star, a star of the second magnitude situated close to the north pole of the heavens, in the constellation Ursa ...
Polaris missile
▪ military technology  first U.S. submarine-launched ballistic missile (SLBM) and the mainstay of the British nuclear deterrent force during the 1970s and ...
—polariscopic /poh lar'euh skop"ik, peuh-/, adj. —polariscopically, adv. /poh lar"euh skohp', peuh-/, n. Optics. an instrument for measuring or exhibiting the polarization of ...
/poh lar"i tee, peuh-/, n. 1. Physics. a. the property or characteristic that produces unequal physical effects at different points in a body or system, as a magnet or storage ...
See polarize. * * *
/poh'leuhr euh zay"sheuhn/, n. 1. a sharp division, as of a population or group, into opposing factions. 2. Optics. a state, or the production of a state, in which rays of light ...
polarization charge
Elect. any electric charge that is bound to an atom or molecule (opposed to free charge). Also called bound charge. * * *
—polarizable, adj. —polarizability, n. /poh"leuh ruyz'/, v., polarized, polarizing. v.t. 1. to cause polarization in. 2. to divide into sharply opposing factions, political ...
/poh"leuh ruyzd'/, adj. 1. of or pertaining to a medium that exhibits polarization. 2. (of an electric plug or outlet) designed so that the plug and outlet fit together in only ...
/poh"leuh ruy'zeuhr/, n. 1. a person or thing that polarizes. 2. Optics. a device, often a crystal or prism, that polarizes light. [1850-55; POLARIZE + -ER1] * * *
polarizing angle
Optics. See under Brewster's law. [1820-30] * * *
polarizing filter
Photog. a camera lens filter used to control the plane of polarization of light entering the lens. * * *
polarizing microscope
a microscope that utilizes polarized light to reveal detail in an object, used esp. to study crystalline and fibrous structures. * * *
po·lar·iz·ing microscope (pōʹlə-rī'zĭng) n. A microscope in which the object viewed is illuminated by polarized light. * * *
polar nucleus n. Either of two nuclei located centrally in a flowering plant embryo sac that eventually fuse to form the endosperm nucleus. * * *
/poh lar"euh gram'/, n. the record produced by the action of a Polarograph. [1920-25; POLAR + -O- + -GRAM1] * * *
/poh lar"euh graf', -grahf', peuh-/, Trademark. a brand name for an instrument that automatically registers the current in electrolysis at a dropping mercury electrode. * * *
See polarography. * * *
See polarographic. * * *
—polarographic /poh lar'euh graf"ik, peuh-/, adj. /poh'leuh rog"reuh fee/, n. Chem. the use of a Polarograph to perform qualitative or quantitative analyses. Also called ...
/poh"leuh royd'/, Trademark. 1. a brand of material for producing polarized light from unpolarized light by dichroism, consisting typically of a stretched sheet of colorless ...
Polaroid Corp.
Major U.S. manufacturer of photographic equipment and supplies. The company was established as Land-Wheelwright Laboratories in 1932 by Edwin Land and George Wheelwright to ...
Polaroid Corporation
▪ American company       American manufacturer of cameras, film, and optical equipment founded by Edwin Herbert Land (Land, Edwin Herbert) (1909–91), who invented ...
n a type of camera that produces a completed print of a photograph immediately after the photograph is taken. It was invented in the US in 1947 by Edwin Land. * * *
polaron [pō′lə rän΄] n. in solid-state physics, an electron and its surrounding field of polarization as it exists within a crystal lattice * * * ▪ subatomic ...
Po·lar Regions (pōʹlər) The various lands and waters surrounding the North Pole and the South Pole, known respectively as the North Polar Region and the South Polar ...
polar star n. See Polaris. * * *
Po·lar·tec (pōʹlər-tĕk') A trademark used for a fleecy synthetic fabric that is warm, lightweight, and water-resistant. * * *
Po·latsk or Po·lotsk (pôʹlətsk) A city of northern Belarus on the Western Dvina River northwest of Vitsyebsk. It was the capital of a principality of the same name from ...
/pohl"deuhr/, n. a tract of low land, esp. in the Netherlands, reclaimed from the sea or other body of water and protected by dikes. [1595-1605; < D] * * * ▪ land  tract of ...
Poldervaart, Arie
▪ American geologist and petrologist born July 6, 1918, Bandung, Java, now in Indonesia died Oct. 28, 1964, New York City       U.S. geologist and petrologist, noted ...
Poldi Pezzoli, Museo
▪ museum, Milan, Italy       (Italian: Poldi Pezzoli Museum), in Milan, museum in the former private house of G.G. Poldi-Pezzoli, housing fine examples of arms and ...
Polding, John Bede
▪ Australian bishop born Nov. 18, 1794, Liverpool died March 16, 1877, Sydney       first Roman Catholic bishop in Australia (from 1835), where eight years later he ...
pole1 —poleless, adj. /pohl/, n., v., poled, poling. n. 1. a long, cylindrical, often slender piece of wood, metal, etc.: a telephone pole; a fishing pole. 2. Northeastern U.S. ...
/pohl/, n. a native or inhabitant of Poland. /pohl/, n. Reginald, 1500-58, English cardinal and last Roman Catholic archbishop of Canterbury. * * * (as used in expressions) bisj ...
pole bean
any vinelike variety of bean that is trained to grow upright on a pole, trellis, fence, etc. [1760-70, Amer.] * * *
pole compass
(formerly) a ship's compass elevated on a wooden pole to isolate it as much as possible from local magnetism. * * *
pole construction
Method of building that dates back to the Stone Age. Excavations in Europe show rings of stones that may have braced huts made of wooden poles or weighted down the walls of ...
pole hammer
a shafted weapon having a spiked hammer head. Also called war hammer. [1870-75] * * *
pole horse
a horse harnessed to the tongue of a vehicle; poler; wheeler. [1815-25, Amer.] * * *
pole jump.
See pole vault. [1895-1900] * * *
pole mast
Naut. a mast on a sailing vessel, consisting of a single piece without separate upper masts. [1760-70] * * *
pole of cold.
See cold pole. * * *
Pole of Inaccessibility
▪ Antarctica       point on the Antarctic continent that is farthest, in all directions, from the surrounding seas, lying on the Polar Plateau in a vast territory ...
pole piece
Elect. a piece of magnetic material at a pole of a permanent magnet or of an electromagnet, shaped to control the magnetic flux distribution in the vicinity of the ...
pole plate
Carpentry. (in a trussed roof) a plate resting upon the beams and supporting common rafters near their lower ends. [1815-25] * * *
pole position
1. a position on the inside of the track in any race. 2. (in auto racing) a starting position on the inside of the front row. 3. an advantageous position. * * *
pole vault
Track. 1. a field event in which a leap or vault over a crossbar is performed with the aid of a long pole. 2. a leap or vault so performed. [1890-95] * * * Track-and-field event ...
Pole, Reginald
born March 3, 1500, Stourton Castle, Staffordshire, Eng. died Nov. 17, 1558, London English Catholic prelate. A cousin of Henry VII, Pole was sent by Henry VIII to study in ...
Pole, Richard de la
▪ British noble died Feb. 24, 1525, Pavia, Duchy of Milan       last Yorkist claimant to the English throne.       Pole was the youngest son of John de la Pole, ...
Pole, Reginald. 1500-1558. English prelate. The last Roman Catholic archbishop of Canterbury (1556), he was a leading figure in the Counter Reformation. * * *
—pole-jumper, n. /pohl"jump'/, v.i. pole-vault. [1895-1900] * * *
—pole-vaulter, n. /pohl"vawlt'/, v.i. to execute a pole vault. [1890-95] * * *
See pole-vault. * * *
/pohl"aks'/, n., pl. poleaxes /-ak'siz/, v., poleaxed, poleaxing. n. 1. a medieval shafted weapon with blade combining ax, hammer, and apical spike, used for fighting on foot. 2. ...
/pohl"aks'/, n., pl. poleaxes /-ak'siz/, v.t., poleaxed, poleaxing. poleax. * * *
pole bean n. Any of various cultivated climbing beans that grow on poles or supports. * * *
/pohl"kat'/, n., pl. polecats, (esp. collectively) polecat. 1. a European mammal, Mustela putorius, of the weasel family, having a blackish fur and ejecting a fetid fluid when ...
pole horse n. A horse harnessed to the pole of a vehicle. * * *
po·leis (pōʹlās') n. Plural of polis. * * *
—polemically, adv. /peuh lem"ik, poh-/, n. 1. a controversial argument, as one against some opinion, doctrine, etc. 2. a person who argues in opposition to another; ...
See polemic. * * *
polemicist [päl′ə mistpō lem′ə sist, pəlem′ə sist] n. a person skilled, or inclined to engage, in polemics: also polemist [päl′ə mist] * * * po·lem·i·cist ...
/peuh lem"euh suyz', poh-/, v.i., polemicized, polemicizing. to practice the art of disputation; to engage in polemics or controversy. Also, esp. Brit., polemicise. [1945-50; ...
/peuh lem"iks, poh-/, n. (used with a sing. v.) 1. the art or practice of disputation or controversy: a master of polemics. 2. the branch of theology dealing with the history or ...
/pol"euh mist, peuh lem"ist, poh-/, n. a person who is engaged or versed in polemics. Also, polemicist /peuh lem"euh sist, poh-/. [1815-25; < Gk polemistés warrior, equiv. to ...
/pol"euh muyz'/, v.i., polemized, polemizing. polemicize. Also, esp. Brit., polemise. [ < Gk pólem(os) war + -IZE] * * *
—polemological /peuh lem'euh loj"i keuhl/, adj. —polemologist, n. /poh'leuh mol"euh jee/, n. the analysis of human conflict and war, particularly international war. [1935-40; ...
▪ plant family  the phlox, or Jacob's ladder, family of plants; there are about 18 genera and some 385 species, mostly in North America but also found in temperate parts of ...
/pol'euh moh'nee ay"sheuhs/, adj. belonging to the Polemoniaceae, the phlox family of plants. Cf. phlox family. [1855-60; < NL Polemoniace(ae) family name (see POLEMONIUM, ...
/poh len"teuh/, n. (esp. in Italian cooking) a thick mush of cornmeal. [1555-65; < It < L: hulled and crushed grain, esp. barley] * * * ▪ food       a porridge or mush ...
Polenta Family
▪ Italian family       Italian noble family, named for its castle of Polenta (located in the Romagna, southwest of Cesena), which dominated the city-state of Ravenna ...
/poh"leuhr/, n. 1. a person or thing that poles. 2. See pole horse. [1680-90; POLE1 + -ER1] * * *
/pohl"stahr'/, n. 1. Polaris. 2. something that serves as a guiding principle. 3. something that is the center of attention or attraction. [1545-55; POLE2 + STAR] * * * ▪ ...
pole vault n. 1. A field event in which an athlete vaults over a high crossbar with the aid of a long pole. 2. A vault made with the aid of a long pole.   poleʹ-vault' ...
▪ Russia       city, Sverdlovsk oblast (province), western Russia, located near the Chusovaya River in the mid-Urals. Founded in 1724 in connection with copper mining, ...
/pohl"weuhrd/, adv. 1. Also, polewards. toward a pole of the earth; toward the North or South Pole. adj. 2. facing or moving toward the North or South Pole. [1870-75; POLE2 + ...
/poh"layn/, n. Armor. a piece for the knee, made of plate or leather. Also called knee cop. See diag. under armor. [1350-1400; ME poleyn, polayne < OF po(u)lain < ?] * * *

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