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opposite field n. Baseball The part of the field that is across from or opposite the side of home plate at which the batter stands, as right field for a left-handed ...
See opposite. * * *
See oppositely. * * *
opposite number n. A person who holds a position in an organization or system corresponding to that of a person in another organization or system; a counterpart: “had a ...
opposites, table of
▪ philosophy       in Pythagorean philosophy, a set of 10 pairs of contrary qualities. The earliest reference is in Aristotle, who said that it was in use among some ...
—oppositional, oppositionary, adj. —oppositionless, adj. /op'euh zish"euhn/, n. 1. the action of opposing, resisting, or combating. 2. antagonism or hostility. 3. a person or ...
opposition, square of
Geometrical representation of the traditional logical relations of opposition (contradictories, contraries, subalterns) among the four types of propositions (universal ...
See opposition. * * *
/op'euh zish"euh nist/, n. a person who offers opposition; a member of an opposition. [1765-75; OPPOSITION + -IST] * * *
—oppressible, adj. —oppressor, n. /euh pres"/, v.t. 1. to burden with cruel or unjust impositions or restraints; subject to a burdensome or harsh exercise of authority or ...
/euh presh"euhn/, n. 1. the exercise of authority or power in a burdensome, cruel, or unjust manner. 2. an act or instance of oppressing. 3. the state of being oppressed. 4. the ...
—oppressively, adv. —oppressiveness, n. /euh pres"iv/, adj. 1. burdensome, unjustly harsh, or tyrannical: an oppressive king; oppressive laws. 2. causing discomfort by being ...
See oppressive. * * *
See oppressively. * * *
See oppress. * * *
—opprobriously, adv. —opprobriousness, n. /euh proh"bree euhs/, adj. 1. conveying or expressing opprobrium, as language or a speaker: opprobrious invectives. 2. outrageously ...
See opprobrious. * * *
/euh proh"bree euhm/, n. 1. the disgrace or the reproach incurred by conduct considered outrageously shameful; infamy. 2. a cause or object of such disgrace or ...
—oppugner, n. /euh pyoohn"/, v.t. 1. to assail by criticism, argument, or action. 2. to call in question; dispute. [1400-50; late ME < L oppugnare to oppose, attack, equiv. to ...
—oppugnancy, n. /euh pug"neuhnt/, adj. opposing; antagonistic; contrary. [1505-15; < L oppugnant- (s. of oppugnans), prp. of oppugnare to oppose. See OPPUGN, -ANT] * * *
See oppugn. * * *
Old Provençal. * * *
Oprah Winfrey
➡ Winfrey * * *
Oprah's Book Club
▪ 1998       In 1996 top-rated daytime television talk-show host Oprah Winfrey, the most financially successful female star on TV, expanded her media empire into the ...
▪ Russian history       private court or household created by Tsar Ivan IV the Terrible (1565) that administered those Russian lands (also known as oprichnina) that had ...
Old Prussian. * * *
/op"ree/, n., pl. opries, adj. Dial. opera1. [1910-15; Amer.] * * *
/ops/, n. the ancient Roman goddess of plenty, and the wife of Saturn and mother of Jupiter: identified with the Greek goddess Rhea. * * *
Office of Price Stabilization. Also, O.P.S. * * *
/op"sin/, n. Biochem. any of several compounds that form the protein component of the light-sensitive retina pigment, rhodopsin. [1950-55; prob. back formation from RHODOPSIN] * ...
/op son"ik/, adj. Immunol. of, pertaining to, or influenced by opsonin; capable of promoting phagocytosis. [1900-05; OPSON(IN) + -IC] * * *
opsonic index
opsonic index n. 〚see OPSONIN〛 the ratio of the number of bacteria destroyed by phagocytes in an individual's blood serum to the number destroyed in a normal blood serum * * *
/op son"euh fuy'/, v.t., opsonified, opsonifying. Immunol. to facilitate phagocytosis of (a microorganism, as a bacterium) by treatment with opsonin. [OPSON(IN) + -IFY] * * *
—opsonoid, adj. /op"seuh nin/, n. Immunol. a constituent of normal or immune blood serum that makes invading bacteria more susceptible to the destructive action of the ...
See opsonize. * * *
—opsonization, n. /op"seuh nuyz'/, v.t., opsonized, opsonizing. Immunol. to increase the susceptibility of (bacteria) to ingestion by phagocytes. Also, esp. Brit., ...
➡ Office of Public Services Reform. * * *
/opt/, v.i. 1. to make a choice; choose (usually fol. by for). 2. opt out, to decide to leave or withdraw: to opt out of the urban rat race and move to the countryside. [1875-80; ...
1. optative. 2. optical. 3. optician. 4. optics. 5. optional. * * *
—optatively, adv. /op"teuh tiv/, Gram. adj. 1. designating or pertaining to a verb mood, as in Greek, that has among its functions the expression of a wish, as Greek íoimen ...
See optative. * * *
/op"tik/, adj. 1. of or pertaining to the eye or sight. 2. optical. n. 3. the eye. 4. a lens of an optical instrument. [1535-45; < ML opticus < Gk optikós, equiv. to opt(ós) ...
optic atrophy
▪ pathology       degeneration of the optic nerve (the second cranial nerve) due to direct or indirect damage to a particular type of retinal (retina) cell, called ...
optic axis
Crystall. (in a crystal exhibiting double refraction) the direction or directions, uniaxial or biaxial, respectively, along which this phenomenon does not occur. [1655-65] * * *
optic center.
Print. See optical center. * * *
optic chiasma
a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain. Also, optic chiasm. [1870-75] * ...
optic disk
optic disk n. BLIND SPOT (sense 1) * * *
optic nerve
Anat. either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain. See illus. under eye. [1605-15] * * ...
optic neuritis
▪ pathology        inflammation of the optic nerve (the second cranial nerve). The inflammation causes a fairly rapid loss of vision in the affected eye (eye, human), ...
—optically, adv. /op"ti keuhl/, adj. 1. of, pertaining to, or applying optics or the principles of optics. 2. constructed to assist sight or to correct defects in vision. 3. of ...
optical activity
Physical Chem. the ability of a substance to rotate the plane of polarization of plane-polarized light. [1875-80] * * * Ability of a substance to rotate the plane of ...
optical art.
See op art. Also, Optical Art. [1960-65] * * *
optical astronomy
—optical astronomer. the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light. [1965-70] * * *
optical axis
▪ optics       the straight line passing through the geometrical centre of a lens and joining the two centres of curvature of its surfaces. Sometimes the optical axis of ...
optical bench
an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ...
optical center
Print. a point about ten percent above the exact center of a printed page or layout. Also called optic center. * * *
optical ceramics
Introduction       advanced industrial materials developed for use in optical applications.       Optical materials derive their utility from their response to ...
optical character reader
optical character reader n. a device for scanning documents by means of OPTICAL CHARACTER RECOGNITION * * *
optical character recognition
Computers. the process or technology of reading data in printed form by a device (optical character reader) that scans and identifies characters. Abbr.: OCR [1960-65] * * *
optical computer
an experimental computer that uses photons rather than electrical impulses to process data a thousand times faster than with conventional integrated circuits. * * *
optical crystallography
      branch of crystallography that deals with the optical properties of crystals (crystal). It is of considerable interest theoretically and has the greatest practical ...
optical disc
optical disc or optical disk n. any disk on which data, as computer text files, video images, or music, is recorded as microscopic pits to be read by a laser * * *
optical disk
Computers, Television. 1. Also, optical disc. Also called laser disk. a grooveless disk on which digital data, as text, music, or pictures, is stored as tiny pits in the surface ...
optical double (star)
optical double (star) or optical double n. DOUBLE STAR (sense 2) * * *
optical double star.
See under double star. * * *
optical effects
Motion Pictures, Television. special visual effects, as the wipe or dissolve, created in the camera or esp. in a film laboratory by technicians using complex optical and ...
optical fiber
a very thin, flexible glass or plastic strand along which large quantities of information can be transmitted in the form of light pulses: used in telecommunications, medicine, ...
optical glass
Optics. any of several types of high-quality, homogeneous, color-free glass, as flint or crown glass, having specified refractive properties, used in lenses and other components ...
optical illusion
optical illusion n. an illusion resulting from certain visual effects that cause a viewer to misunderstand or misinterpret what he or she actually sees * * *
optical illusion.
See under illusion (def. 4). [1785-95] * * *
optical image
▪ optics       the apparent reproduction of an object, formed by a lens or mirror system from reflected, refracted, or diffracted light waves. There are two kinds of ...
optical interferometer
▪ instrument       instrument for making precise measurements for beams of light of such factors as length, surface irregularities, and index of refraction. It divides ...
optical isomer
Chem. any of two or more isomers exhibiting optical isomerism. [1890-95] * * *
optical isomerism
Chem. stereoisomerism in which the isomers are identical in molecular weight and most chemical and physical properties but differ in their effect on the rotation of polarized ...
optical maser
Physics. laser. * * *
optical model
▪ nuclear physics       in physics, description of atomic nuclei as similar to cloudy crystal balls in that, when struck by a beam of particles, they partially absorb ...
optical path
the path of light through a medium, having a magnitude equal to the geometric distance through the system times the index of refraction of the medium. [1890-95] * * *
optical printer
a film printer used in making optical effects, consisting basically of a camera that photographs the image with special lenses to enlarge, reduce, distort, etc., and a projector ...
optical pumping
Physics, Optics. a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to ...
optical rotation
Physical Chem. the angle at which the plane of polarized light is rotated when passed through an optically active substance. [1890-95] * * *
optical scanning
the process of interpreting data in printed, handwritten, bar-code, or other visual form by a device (optical scanner or reader) that scans and identifies the data. Cf. optical ...
optical sound
Motion Pictures. sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack. [1930-35] * * *
optical sound recording
      use of an optical system for registering sound on photographic film; it is a technique widely used in making the sound track (q.v.) of motion pictures. * * *
optical soundtrack
the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through ...
optical storage
▪ technology  electronic storage medium that uses low-power laser beams to record and retrieve digital (binary) data. In optical-storage technology, a laser beam encodes ...
optical tooling
the technique of establishing precise reference lines and planes by means of telescopic sights, esp. for the purpose of aligning machinery, machine-shop work, etc. * * *
optical wedge
a wedge-shaped filter whose transmittance decreases from one end to the other: used as an exposure control device in sensitometry. Also called wedge. * * *
optical activity n. Chemistry A property caused by asymmetrical molecular structure that enables a substance to rotate the plane of incident polarized light. * * *
optical art n. Op art. * * *
opticalcharacter reader
optical character reader n. Abbr. OCR A device used for optical character recognition. * * *
opticalcharacter recognition
optical character recognition n. Abbr. OCR 1. The electronic identification and digital encoding of printed or handwritten characters by means of an optical scanner and ...
optical computer n. A computer that uses holograms for compact data storage and laser beams for connections. Most optical computers use electronic components for computation. * * ...
optical disk or optical disc n. A plastic-coated disk that stores digital data, such as music or text, as tiny pits etched into the surface and is read with a laser scanning the ...
optical fiber n. A flexible optically transparent fiber, usually made of glass or plastic, through which light can be transmitted by successive internal reflections. * * *
optical illusion n. A visually perceived image that is deceptive or misleading. * * *
optical isomer n. See enantiomorph. * * *
See optical. * * *
optical maser n. A laser, especially one that produces visible radiation. * * *
optical scanner n. A device that converts printed images and text into digital information that can be stored as a computer file and processed by graphics software. * * *
optical tweezers pl.n. (used with a sing. or pl. verb) A technique that uses a single-beam laser directed through an objective lens to trap, image, and manipulate micron-sized ...
optic axis n. An optical path through a crystal along which a ray of light can pass without undergoing double refraction. * * *
optic chiasma n. A structure in the brain formed by the partial intersection or crossing of the optic nerve fibers on the underside of the hypothalamus. Also called optic ...
optic cup n. Embryology A two-walled cuplike depression, formed by invagination of the optic vesicle, that develops into the pigmented and sensory layers of the retina. Also ...
optic disk n. Anatomy See blind spot. * * *
/op tish"euhn/, n. 1. a person who makes or sells eyeglasses and, usually, contact lenses, for remedying defects of vision in accordance with the prescriptions of ...
/op"teuh sist/, n. Now Rare. a person engaged in the fields of theoretical or applied optics. [1880-85, Amer.; OPTIC(S) + -IST] * * *
optic lobe n. Either of two lobes of the dorsal part of the midbrain, containing primary visual centers. * * *
optic nerve n. Either of the second pair of cranial nerves that arise from the retina and carry visual information to the thalamus and other parts of the brain. * * *
/op"tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605-15; < ...
optic vesicle n. An evagination on either side of the embryonic forebrain from which the optic nerve and retina develop. * * *
op·ti·ma (ŏpʹtə-mə) n. A plural of optimum. * * *
—optimally, adv. /op"teuh meuhl/, adj. optimum (def. 3). [1885-90; OPTIM(UM) + -AL1] * * *
See optimal. * * *
Optimates and Populares
Ideological positions in ancient Rome that became defined in the early 1st century BC. Both groups came from the wealthier classes. The Optimates (Latin: "Best Ones," ...
/op"teuh mee'/, n. (formerly at Cambridge University, England) a student taking second or third honors in the mathematical tripos. Cf. wrangler (def. 2). [1700-10; extracted from ...
/op"teuh miz'euhm/, n. 1. a disposition or tendency to look on the more favorable side of events or conditions and to expect the most favorable outcome. 2. the belief that good ...
/op"teuh mist/, n. 1. an optimistic person. 2. a person who holds the belief or the doctrine of optimism. [1760-70; < F optimiste < L optim(um) (see OPTIMUM) + F -iste -IST] * * *
—optimistically, adv. /op'teuh mis"tik/, adj. 1. disposed to take a favorable view of events or conditions and to expect the most favorable outcome. 2. reflecting optimism: an ...
See optimistic. * * *
/op'teuh meuh zay"sheuhn/ 1. the fact of optimizing; making the best of anything. 2. the condition of being optimized. 3. Math. a mathematical technique for finding a maximum or ...
/op"teuh muyz'/, v., optimized, optimizing. v.t. 1. to make as effective, perfect, or useful as possible. 2. to make the best of. 3. Computers. to write or rewrite (the ...
/op"teuh meuhm/, n., pl. optima /-meuh/, optimums, adj. n. 1. the best or most favorable point, degree, amount, etc., as of temperature, light, and moisture for the growth or ...
optimum programming
Computers. See minimum access programming. * * *
opting out
n [U] (in Britain) the process of choosing to leave the previous system in order to become more independent. The Conservative government in the 1990s encouraged many secondary ...
—optionable, adj. /op"sheuhn/, n. 1. the power or right of choosing. 2. something that may be or is chosen; choice. 3. the act of choosing. 4. an item of equipment or a feature ...
—optionality, n. —optionally, adv. /op"sheuh nl/, adj. 1. left to one's choice; not required or mandatory: Formal dress is optional. 2. leaving something to choice. [1755-65; ...
See optional. * * *
/op'sheuh nee"/, n. a person who acquires or holds a legal option. [OPTION + -EE] * * *
a combining form meaning "optic" or "vision," used in the formation of compound words: optometry. [ < Gk optós visible; akin to óps face; cf. EYE] * * *
optoacoustic [äp΄tō ə ko͞os′tik] adj. of an effect, technique, etc. in which light, as a laser beam, generates sound waves in a gas or other medium * * *
—optoelectronic, adj. /op'toh i lek tron"iks, -ee'lek-/, n. (used with a sing. v.) the branch of electronics dealing with devices that generate, transform, transmit, or sense ...
/op tom"i teuhr/, n. any of various instruments for measuring the refractive error of an eye. [1730-40; OPTO- + -METER] * * *
See optometry. * * *
See optometric. * * *
/op tom"i trist/, n. a licensed professional who practices optometry. [1900-05; OPTOMETR(Y) + -IST] Syn. See eye doctor. * * *
—optometrical /op'teuh me"tri keuhl/, adj. /op tom"i tree/, n. the practice or profession of examining the eyes, by means of suitable instruments or appliances, for defects in ...
/op"teuh fohn'/, n. an electronic device that scans ordinary printed characters and produces combinations of sounds, enabling a blind reader to recognize the characters. [OPTO- + ...
/op"teuh tuyp'/, n. Ophthalm. type used on an eye chart. [1885-90; OPTO- + -TYPE] * * *
n [U] a liquid for washing sore eyes. A bottle of Optrex can be bought with an eye bath (= a small container for the liquid which is held against the eye to wash it). * * *
/op"yeuh leuhns/, n. 1. wealth, riches, or affluence. 2. abundance, as of resources or goods; plenty. 3. the state of being opulent. Also, opulency. [1500-10; < L opulentia ...
—opulently, adv. /op"yeuh leuhnt/, adj. 1. characterized by or exhibiting opulence: an opulent suite. 2. wealthy, rich, or affluent. 3. richly supplied; abundant or plentiful: ...
See opulent. * * *
opuntia [ō pun′shē ə, ō pun′shə] n. 〚ModL < L (herba) Opuntia, (plant) of Opus, city in LOCRIS〛 any of a large genus (Opuntia) of cactus plants with red, purple, or ...
/oh"peuhs/, n., pl. opuses or, esp. for 1, 2, opera /oh"peuhr euh, op"euhr euh/. 1. a musical composition. 2. one of the compositions of a composer, usually numbered according to ...
opus Alexandrinum
▪ mosaic       in mosaic, type of decorative pavement work widely used in Byzantium in the 9th century. It utilized tiny, geometrically shaped pieces of coloured stone ...
opus anglicanum
▪ embroidery       (Latin: “English work”), embroidery done in England between about 1100 and about 1350 and of a standard unsurpassed anywhere. The technical skill ...
Opus Dei
(Latin; "work of God") Roman Catholic lay and clerical organization whose actions and beliefs have been both criticized and praised. Its members seek personal Christian ...
opus interassile
▪ metalwork       metalwork technique developed in Rome and widely used during the 3rd century AD, especially appropriate for making arabesques and other ...
opus sectile
▪ mosaic       type of mosaic work in which figural patterns are composed of pieces of stone or, sometimes, shell or mother-of-pearl cut in shapes to fit the component ...
opus signinum
▪ mosaic       in mosaic, type of simple, unpatterned or roughly patterned pavement commonly used in Roman times. It was composed of river gravel, small pieces of stone, ...
opus tessellatum
▪ mosaic       mosaic technique that involves the use of tesserae (tessera) (small cubes of stone, marble, glass, ceramic, or other hard material) of uniform size ...
opus vermiculatum
▪ mosaic       type of mosaic work frequently used in Hellenistic (Hellenistic Age) and Roman times, in which part or all of a figural mosaic is made up of small, ...
—opuscular, adj. /oh pus"kyoohl/, n. 1. a small or minor work. 2. a literary or musical work of small size. [1650-60; < F < L opusculum, equiv. to opus work + -culum -CULE1] * ...
/oh pus"kyeuh leuhm/, n., pl. opuscula /-leuh/. opuscule. * * *
O·pus De·i (ōʹpəs dāʹē, dāʹ) n. A Roman Catholic organization composed of both clergy and lay members and dedicated to fostering Christian principles at all levels of ...
OPV abbr. oral poliovirus vaccine. * * *
/oh kwas"euh, oh kwah"seuh/, n., pl. oquassas, (esp. collectively) oquassa. a small, dark-blue brook trout, Salvelinus oquassa, of Maine. [1880-85; < Eastern Abenaki àk2asse] * ...
Oquirrh Mountains
▪ mountains, Utah, United States also called  Oquirrh Range        mountain range that extends about 30 miles (50 km) southward from the southern end of the Great ...
or1 /awr/; unstressed /euhr/, conj. 1. (used to connect words, phrases, or clauses representing alternatives): books or magazines; to be or not to be. 2. (used to connect ...
/awr/, n. a Boolean operator that returns a positive result when either or both operands are positive. 1. Law. on (one's own) recognizance. 2. operating room. 3. operations ...
OR circuit
/awr/, Computers. a circuit that is energized when any of its inputs are energized. Also called OR gate. [so called from the disjunctive operation of such circuits; see OR1 (def. ...
OR gate
/awr/, Computers. See OR circuit. * * *
Large bird. Oldest form *ə₃er-, colored to *ə₃or-. 1. Suffixed form *or-n-. erne, from Old English earn, eagle, from Germanic *arnuz, eagle. 2. Suffixed form *or-n-īth-. ...
ora1 /awr"euh, ohr"euh/, n. pl. of os2. ora2 /awr"euh, ohr"euh/, n., pl. oras, orae /awr"ee, ohr"ee/. a money of account of Anglo-Saxon England, introduced by the Danes and equal ...
ora pro nobis
/awr"ah proh noh"bis, ohr"ah/, Latin. pray for us. * * *
/awr"euhch, or"-/, n. any plant of the genus Atriplex, esp. A. hortensis, of the goosefoot family, cultivated for use like spinach. Also, orache. [1350-1400; ME orage, arage < OF ...
/awr"euh keuhl, or"-/, n. 1. (esp. in ancient Greece) an utterance, often ambiguous or obscure, given by a priest or priestess at a shrine as the response of a god to an ...
oracle bones
a group of inscribed animal bones and shells discovered in China and used originally in divination by the ancient Chinese, esp. during the Shang dynasty. [1910-15] * * *
Oracle Corporation
▪ American company formerly  Software Development Laboratories (1977–79),  Relational Software Inc. (1979–82),  and  Oracle Systems Corporation ...
—oracularly, adv. —oracularity /aw rak'yeuh lar"i tee, oh rak'-/, oracularness, n. /aw rak"yeuh leuhr, oh rak"-/, adj. 1. of the nature of, resembling, or suggesting an ...
See oracular. * * *
See oracularity. * * *
/awr"euh see, ohr"-/, n. the ability to express oneself in and understand spoken language. [1960-65; OR(AL) + (LITER)ACY] * * *
/awr"ad, ohr"-/, adv. Anat., Zool. toward the mouth or the oral region. [1890-95; < L or- (s. of os) mouth + -AD3] * * *
/aw rddah"dyah/, n. a city in NW Rumania. 178,407. Also called Oradea Mare /mah"rdde/. German, Grosswardein. Hungarian, Nagyvárad. * * * ▪ Romania German  Grosswardein , ...
▪ France       village, Haute-Vienne département, Limousin région, south-central France. It is located 14 miles (23 km) northwest of ...
Orage, Alfred Richard
▪ British political scientist and editor original name  Alfred James Orage   born Jan. 22, 1873, Dacre, Yorkshire, Eng. died Nov. 6, 1934, London       influential ...
▪ Arizona, United States also called  Orayvi,  or  Old Oraibi         Hopi pueblo (village), Navajo county, northeastern Arizona, U.S. The pueblo is situated on ...
—orality, n. —orally, adv. /awr"euhl, ohr"-/, adj. 1. uttered by the mouth; spoken: oral testimony. 2. of, using, or transmitted by speech: oral methods of language teaching; ...
oral and maxillofacial surgery
▪ dentistry       dental specialty that deals with the diagnosis and surgical treatment of the diseases, injuries, and defects of the human mouth, jaw, and associated ...
oral cancer
▪ pathology Introduction       disease characterized by the growth of cancerous cells in the mouth, including the lips. Oral cancer is often associated with cancers of ...
oral contraceptive
Pharm. See birth-control pill. [1955-60] * * *
oral herpes
Pathol. a disease caused by herpes simplex virus type 1, characterized primarily by a cluster of small, transient blisters chiefly at the edge of the lip or nostril; herpes ...
oral history
—oral historian. 1. information of historical or sociological importance obtained usually by tape-recorded interviews with persons whose experiences and memories are ...
oral hygiene
the state or practice of keeping the mouth cavity in a healthy condition, as by a regular program of brushing and flossing the teeth combined with periodic examinations by a ...
oral interpretation
the study and practice of vocally expressing the meaning of written compositions, esp. of literature. * * *
Oral Roberts
➡ Roberts (II) * * *
Oral Roberts University
▪ university, Tulsa, Oklahoma, United States       private, coeducational institution of higher learning in Tulsa, Oklahoma, U.S. An interdenominational Protestant ...
oral sex
sexual contact between the mouth and the genitals or anus; fellatio, cunnilingus, or anilingus. * * *
oral stage
▪ psychology       in Freudian psychoanalytic theory, initial psychosexual stage during which the developing infant's main concerns are with oral gratification. The oral ...
oral surgery
—oral surgeon. 1. the branch of dentistry or of surgery dealing with the surgical treatment or repair of various conditions of the mouth or jaws. 2. surgical treatment of any ...
oral tradition
Cultural information passed on from one generation to the next by storytellers. The forms of oral tradition include poetry (often chanted or sung), folktales, and proverbs as ...
o·ral-for·mu·la·ic (ôrʹəl-fôr'myə-lāʹĭk, ōrʹ-) adj. Of or relating to poetry in which traditional material is improvised at each performance by using verbal ...
oral contraceptive n. A pill, typically containing estrogen or progesterone, that inhibits ovulation and thereby prevents conception. Also called birth control pill. * * *
/aw ray"lee, oh ray"-/, n. Eccles. fanon (def. 2). [1835-45; < ML orale, equiv. to L or- (s. of os) mouth + -ale, neut. of -alis -AL1] * * *
oral history n. 1. Historical information, usually tape-recorded or videotaped, obtained in interviews with persons having firsthand knowledge. 2. An audiotape, videotape, or ...
oral hygiene n. See dental hygiene. * * *
/awr"euh liz'euhm, ohr"-/, n. the theory, practice, or advocacy of education for the deaf chiefly or exclusively through lipreading, training in speech production, and training ...
/awr"euh list, ohr"-/, n. 1. an advocate of oralism. 2. a deaf person who communicates through lipreading and speech. adj. 3. of or pertaining to oralism. Cf. ...
/aw ral"i tee, oh ral"-/, n. Psychoanal. the condition or quality of being oral; collectively, the personality traits characteristic of the oral phase of psychosexual ...
See oral. * * *
oral sex n. Sexual activity involving oral stimulation of one's partner's sex organs. * * *
oral tradition n. The spoken relation and preservation, from one generation to the next, of a people's cultural history and ancestry, often by a storyteller in narrative form. * ...
/aw ran", oh ran"/; Fr. /aw rddahonn"/, n. a seaport in NW Algeria. 1,075,000. * * * City (pop., 1998: 692,516), northwestern Algeria. Situated on the Mediterranean Sea, it is ...
/aw rang", oh rang"/, n. orangutan. * * *
/awr"inj, or"-/, n. 1. a globose, reddish-yellow, bitter or sweet, edible citrus fruit. 2. any white-flowered, evergreen citrus trees of the genus Citrus, bearing this fruit, as ...
/awr"inj, or"-/; Fr. /aw rddahonnzh"/ for 3, 6, n. 1. a member of a European princely family ruling in the United Kingdom from 1688 to 1694 and in the Netherlands since 1815. 2. ...
orange blossom
1. the white flower of an orange tree, esp. of the genus Citrus, much used in wreaths, bridal bouquets, etc.: the state flower of Florida. 2. a cocktail made of gin, orange ...
Orange Bowl
▪ football game       American college postseason gridiron football (football, gridiron) game played for many years on New Year's Day in Miami. It is one of four bowls ...
Orange Bowl Table
▪ Table Orange Bowl season result 1932–33* Miami (Fla.)   7 Manhattan   0 1933–34* Duquesne 33 Miami (Fla.)   7 1934–35 Bucknell 26 Miami ...
orange flower oil.
See neroli oil. [1830-40] * * *
Orange Free State
a province in central Republic of South Africa: a Boer republic 1854-1900; a British colony (Orange River Colony) 1900-10. 1,716,350. 49,647 sq. mi. (128,586 sq. km). Cap.: ...
orange hawkweed
a European composite plant, Hieracium aurantiacum, having orange, dandelionlike flowers, growing as a weed, esp. in eastern North America. Also called devil's ...
orange III
Chem. See methyl orange. * * *
orange lily
a bulbous lily, Lilium bulbiferum, of the mountainous regions of southern Europe, having erect, crimson-spotted, orange flowers. [1855-60] * * *
orange milkweed.
See butterfly weed (def. 1). * * *
Orange Mountains
former name of Jayawijaya. * * *
Orange Order
➡ Orangeman * * * ▪ Irish political society also called  Loyal Orange Association,  original name  Orange Society,  byname  Orangemen,         an Irish ...
orange pekoe
1. a black tea composed of the smallest top leaves and grown in India and Ceylon. 2. any India or Ceylon tea of good quality. [1875-80] * * *
Orange Prize
n a British prize given every year for the best novel written in English by a woman from any part of the world. The money for this large prize is provided by Orange, and the ...
Orange River
River, southern Africa. It rises in the Lesotho Highlands as the Sinqu River and flows west as the Orange across South Africa. It passes the southern edge of the Kalahari Desert ...
orange roughy
orange roughy [ruf′ē] n. pl. roughy orange roughy a bright reddish-orange food fish (Hoplostethus atlanticus) of an order (Beryciformes, family Trachichthyidae) of deep-sea ...
orange rust
Plant Pathol. a disease of blackberries and raspberries, characterized by an orange, powdery mass of spores on the undersides of the leaves and stunted, misshapen foliage, caused ...
Orange Society
➡ Orangeman * * *
orange stick
a slender, rounded stick, originally of orangewood, having tapered ends and used in manicuring, esp. to push back the cuticles or clean the fingernails. [1910-15, Amer.] * * *
orange sulfur.
See alfalfa butterfly. * * *
Orange Walk
▪ Belize       town, northwestern Belize, situated on the left (west) bank of the New River. Established in early colonial times, it was pillaged by rebellious Maya in ...
Orange, councils of
▪ Christian synods       two church synods held in Orange, France, in 441 and 529. The first, under the presidency of St. Hilary of Arles (Hilary of Arles, Saint), dealt ...
Orange, house of
Princely dynasty and royal family of The Netherlands. The title began with William I (the Silent), prince of Orange-Nassau, who was stadtholder (viceroy) of the Netherlands, as ...
orange-tip butterfly
▪ insect  any of a group of butterflies in the subfamily Pierinae (family Pieridae, order Lepidoptera) that have a wingspan of 37 to 63 mm (1.5 to 2.5 inches). The ...
/awr'inj ayd", -in jayd", or'-/, n. a beverage consisting of orange juice, sweetener, and water, sometimes carbonated. [1700-10; < F; see ORANGE, -ADE2] * * *
/awr"inj berrg', or"-/, n. a city in central South Carolina. 14,933. * * * ▪ South Carolina, United States       city, seat of Orangeburg county, central South ...
OrangeFree State
Orange Free State A province and historical region of east-central South Africa. European settlement of the area began early in the 1800s and accelerated with an influx of Boer ...
orange hawkweed n. A European perennial weed (Hieracium aurantiacum) common on the Pacific coast and the eastern regions of North America, having hairy leaves and clusters of ...
—Orangeist, n. /awr"in jiz'euhm, or"-/, n. the principles and practices of the Orangemen. [1815-25; ORANGE + -ISM] * * *
/awr"inj meuhn, or"-/, n., pl. Orangemen. 1. a member of a secret society formed in the north of Ireland in 1795, having as its object the maintenance and political ascendancy of ...
Orangemen's Day
July 12, an annual celebration in Northern Ireland and certain cities having a large Irish section, esp. Liverpool, to mark both the victory of William III over James II at the ...
orange milkweed n. See butterfly weed. * * *
orange pekoe n. A grade of black tea consisting of the end buds of the shoot or their surrounding two full leaves.   [From the orange color of its infusion.] * * *
Orange River A river, about 2,092 km (1,300 mi) long, of Lesotho, South Africa, and Namibia flowing southwest, northwest, and west to the Atlantic Ocean. It is used extensively ...
or·ange·root (ôrʹənj-ro͞ot', -ro͝ot', ŏrʹ-) n. See goldenseal. * * *
/awr"inj ree, or"-/, n., pl. orangeries. a warm place, as a greenhouse, in which orange trees are cultivated in cool climates. [1655-65; < F orangerie, equiv. to orang(er) orange ...
Oranges and Lemons
an old English children’s song about the sounds of church bells in various parts of London. It is often part of a game that young children play: two of them form an arch with ...
Oranges, War of the
▪ Iberian history       (1801), brief conflict in which France and Spain fought against Portugal. The war was brought about by Portugal's refusal in 1800 to accept ...
orange stick n. A stick of orangewood with tapered ends, used in manicuring. * * *
/awr"inj vayl', or"-/, n. a town in central California, near Sacramento. 20,585. * * *
/awr"inj vil', or"-/, n. a town in SE Ontario, in S Canada. 13,740. * * *
/awr"inj wood', or"-/, n. the hard, fine-grained, yellowish wood of the orange tree, used in inlaid work and fine turnery. [1880-85; ORANGE + WOOD1] * * *
See orangy. * * *
/aw rang"oo tan', oh rang"-, euh rang"-/, n. a large, long-armed anthropoid ape, Pongo pygmaeus, of arboreal habits, inhabiting Borneo and Sumatra: an endangered species. Also, ...
/awr"in jee, or"-/, adj. resembling or suggesting an orange, as in taste, appearance, or color: decorated with orangy-pink flowers. Also, orangey, orangish. [1770-80; ORANGE + ...
/aw ray"nee euhn, oh ray"-/, adj. Ibero-Maurusian. [presumably < F oranien, equiv. to Oran, seaport in NW Algeria + -ien -IAN] * * *
▪ Namibia       planned company town in one of the principal gem- diamond-producing areas of the world, extreme southwestern Namibia. It is located near the Atlantic ...
Seaport and chief administrative town (pop., 2000: 26,355), Aruba, Netherlands Antilles. It is located on the western coast of this Caribbean island. It is a free port and a ...
/awr"anz, ohr"-/, n., pl. orantes /aw ran"teez, oh ran"-/ orant. * * *
/awr"euhnt, ohr"-/, n. Fine Arts. a representation of a female figure, with outstretched arms and palms up in a gesture of prayer, in ancient and early Christian art. Also, ...
▪ people also called  Kurukh,         aboriginal people of the Choṭa Nāgpur region in the state of Bihār, India. They call themselves Kurukh and speak a Dravidian ...
▪ Botswana       mining town, east-central Botswana. It is located about 240 miles (385 km) north of Gaborone, the national capital. Situated on the eastern edge of the ...
/euh rair"ee euhn/, n., pl. oraria /euh rair"ee euh/. Eastern Ch. a stole worn by deacons. Also, orarium. [1700-10; < MGk orárion < LL orarium, L: napkin, equiv. to or- (s. of ...
/euh rair"ee euhm/, n., pl. oraria /euh rair"ee euh/. orarion. * * *
/aw rayt", oh rayt", awr"ayt, ohr"ayt/, v.i., v.t., orated, orating. to deliver an oration; speak pompously; declaim. [1590-1600; back formation from ORATION] * * *
orate fratres
/aw rah"te frah"tres/, Rom. Cath. Ch. the call to prayer, addressed by the celebrant of the Mass to the people just before the Secret. [ < L orate fratres pray, brothers] * * *
/aw ray"sheuhn, oh ray"-/, n. 1. a formal public speech, esp. one delivered on a special occasion, as on an anniversary, at a funeral, or at academic exercises. 2. a public ...
—oratorlike, adj. —oratorship, n. /awr"euh teuhr, or"-/, n. 1. a person who delivers an oration; a public speaker, esp. one of great eloquence: Demosthenes was one of the ...
/awr'euh tawr"ee euhn, -tohr"-, or'-/, Rom. Cath. Ch. n. 1. a member of an Oratory. adj. 2. of or pertaining to the Oratorians. [1635-45; ORATORY2 + -AN] * * * ▪ religious ...

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