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polarization
1. In electricity, coating of an electrode with a thick layer of hydrogen bubbles, with the result that the flow of current is weakened or arrested. 2. A change effected in a ...
polarize
To put into a state of polarization.
polarizer
The first element of a polariscope that polarizes the light, as distinguished from the analyzer, the second polarizing element.
polarography
That branch of electrochemistry concerned with the variation in current flowing through a solution as the voltage is varied; this will vary with the ionic concentration of ...
poldine methylsulfate
An anticholinergic agent.
pole
1. One of the two points at the extremities of the axis of any organ or body. 2. Either of the two points on a sphere at the greatest distance from the equator. 3. One of the ...
Polenské number
See under number.
policeman
An instrument, usually a rubber-tipped rod, for removing solid particles from a container, particularly the walls of that container.
Polio
Abbreviation for poliomyelitis, an acute and sometimes devastating disease caused by a virus. Man is the only natural host for polio virus. The virus enters the mouth and ...
Polio immunization
The vaccines available for vaccination against polio are OPV (Oral Polio Vaccine) and IPV (Inactivated Polio Vaccine). OPV is still the preferred vaccine for most ...
Polio vaccine, Salk
Vaccine against the virus that causes the nerve disease poliomyelitis. The Salk vaccine is named for Dr. Jonas Salk who developed and introduced it in 1955. The Salk vaccine ...
Polio, abortive
A minor form of infection with the polio virus, abortive polio accounts for 80 to 90 percent of clinically apparent cases in the US, chiefly occurring in young children. The ...
polio-
Gray; gray matter (substantia grisea). [G. polios]
polioclastic
Destructive to gray matter of the nervous system. [ polio- + G. klastos, broken]
poliodystrophia
SYN: poliodystrophy. - p. cerebri progressiva infantilis [MIM*203700] autosomal recessively inherited progressive spastic paresis of extremities with progressive mental ...
poliodystrophy
Wasting of the gray matter of the nervous system. SYN: poliodystrophia. [ polio- + G. dys-, bad, + trophe, nourishment] - progressive cerebral p. SYN: poliodystrophia cerebri ...
polioencephalitis
Inflammation of the gray matter of the brain, either of the cortex or of the central nuclei; as contrasted to inflammation of the white matter. [ polio- + G. enkephalos, brain, + ...
polioencephalomeningomyelitis
Inflammation of the gray matter of the brain and spinal cord and of the meningeal covering of the parts. [ polio- + G. enkephalos, brain, + meninx, membrane, + myelon, marrow, + ...
polioencephalomyelitis
Inflammation of the gray matter of the brain and spinal cord.
polioencephalopathy
Any disease of the gray matter of the brain. [ polio- + G. enkephalos, brain, + pathos, suffering]
Poliomyelitis
An acute and sometimes devastating viral disease. Man is the only natural host for poliovirus. The virus enters the mouth and multiplies in lymphoid tissues in the pharynx and ...
poliomyeloencephalitis
Acute anterior poliomyelitis with pronounced cerebral signs. [ polio- + G. myelon, marrow, + enkephalos, brain, + -itis, inflammation]
poliomyelopathy
Any disease of the gray matter of the spinal cord. [ polio- + G. myelon, marrow, + pathos, suffering]
poliosis
A patchy absence or lessening of melanin in hair of the scalp, brows, or lashes, due to lack of pigment in the epidermis; it occurs in several hereditary syndromes but may be ...
poliovirus
An enterovirus in the family Picornaviridae. There are 3 distinct serotypes, with Type 1 responsible for 85% of the cases of paralytic polio and most epidemics.
poliovirus hominis
SYN: poliomyelitis virus.
polishing
In dentistry, the act or process of making a restoration smooth and glossy.
Politzer
Adam, Austrian otologist, 1835–1920. See P. bag, P. method, P. luminous cone.
politzerization
Inflation of the eustachian tube and middle ear by the Politzer method. - negative p. withdrawal of secretions from a cavity by suction, effected by attaching a compressed ...
polkissen of Zimmermann
SYN: extraglomerular mesangium. [Ger. Polkissen, pole + cushion]
pollakidipsia
Rarely used term for unduly frequent thirst. [G. pollakis, often, + dipsa, thirst]
pollakiuria
Rarely used term for extraordinary urinary frequency. [G. pollakis, often, + ouron, urine]
pollen
Microspores of seed plants carried by wind or insects prior to fertilization; important in the etiology of hay fever and other allergies. [L. fine dust, fine flour]
pollenosis
SYN: pollinosis.
pollex
SYN: thumb. [L.] - p. pedis SYN: great toe I.
pollicization
Construction of a substitute thumb. [L. pollex, thumb, + -ize, to make like, + -ation, state]
pollinosis
Hay fever excited by the pollen of various plants. SYN: pollenosis. [L. pollen, pollen, + G. -osis, condition]
pollutant
An undesired contaminant that results in pollution.
pollution
Rendering unclean or unsuitable by contact or mixture with an undesired contaminant. [L. pollutio, fr. pol-luo, pp. -lutus, to defile] - air p. contamination of air by smoke and ...
polocyte
SYN: polar body. [G. polos, pole, + kytos, cell]
polonium
A radioactive element, atomic no. 84, isolated from pitchblende; the longest-lived isotope is 209Po (half-life 102 years); 210Po is radium F (half-life 138.38 days), the only ...
poloxalene
An oxyalkylene polymer, nonionic surface-active agent similar in actions and uses to dioctyl sodium sulfosuccinate; used in constipation due to hard dry stools. SYN: ...
poloxalkol
SYN: poloxalene.
polster
A bulge of smooth muscle cells, as in the penile arteries and veins, formerly thought to regulate blood flow. [G. cushion, bolster]
polus
SYN: pole. [L. pole] - p. anterior bulbi oculi [TA] SYN: anterior pole of eyeball. - p. anterior lentis [TA] SYN: anterior pole of lens. - p. frontalis [TA] SYN: frontal pole ...
poly
Abbreviated form and colloquialism for polymorphonuclear leukocyte. 1. Abbreviation for poly(adenylic acid). 2. Iridoid indole alkaloid isolated from Vinca sp.; may have ...
poly
Abbreviated form and colloquialism for polymorphonuclear leukocyte. 1. Abbreviation for poly(adenylic acid). 2. Iridoid indole alkaloid isolated from Vinca sp.; may have ...
poly(uridylic acid)
A homopolymer of uridylic acid s.
Poly-
1) Prefix meaning much or many For example, polycystic means characterized by many cysts. 2) Short form for polymorphonuclear leukocyte, a type of white blood cell. * * * 1. ...
poly-β-glucosaminidase
SYN: chitinase.
Pólya
Jenö (Eugene), Hungarian surgeon, 1876–1944. See P. gastrectomy, P. operation, Reichel-P. stomach procedure.
polyacid
An acid capable of liberating more than one hydrogen ion per molecule; e.g., H2SO4, citric acid. [G. polys, much, many + acid]
polyacrylamide
A branched polymer of acrylamide (H2C=CHCONH2) that is used in gel electrophoresis; e.g., R–CH2–CH(CONH2)–CH(CONHR)CH(CONHR′)–R″.
polyadenitis
Inflammation of many lymph node s, especially with reference to the cervical group. - p. maligna SYN: bubonic plague.
polyadenopathy
Adenopathy affecting many lymph node s. SYN: polyadenosis.
polyadenosis
SYN: polyadenopathy.
polyadenous
Pertaining to or involving many glands.
polyadenylation
1. The process of formation of poly(adenylic acid). 2. The covalent modification of a macromolecule ( E.G., mRNA) by the formation of a polyadenylyl moiety covalent linked ...
polyalcohol
An aliphatic or alicyclic molecule characterized by the presence of two or more hydroxyl groups; e.g., glycerol, inositol. [G. polys, much, many + alcohol]
polyallelism
The existence of multiple alleles at a genetic locus.
polyamine
Class name for substances of the general formula H2N(CH2)nNH2, H2N(CH2)nNH(CH2)nNH2, H2N(CH2)nNH(CH2)nNH(CH2)nNH2, where n = 3, 4, or 5. Many polyamines arise by bacterial action ...
polyangiitis
Inflammation of multiple blood vessel s involving more than one type of vessel, e.g., arteries and veins, or arterioles and capillaries. - microscopic p. systemic, ...
polyanion
Anionic sites on proteoglycans in the renal glomeruli that restrict filtration of anionic molecules and facilitate filtration of cationic proteins; loss of p. may cause ...
polyarteritis
Simultaneous inflammation of a number of arteries. - p. nodosa segmental inflammation, with infiltration by eosinophils, and necrosis of medium-sized or small arteries, more ...
Polyarteritis nodosa
An autoimmune disease (immune system attacking its own body) characterized by spontaneous inflammation of the arteries (arteritis) of the body. Because arteries are involved, the ...
polyarthric
SYN: multiarticular.
polyarthritis
Simultaneous inflammation of several joints. [poly- + G. arthron, joint, + -itis, inflammation] - p. chronica obsolete term for rheumatoid arthritis. - p. chronica villosa a ...
Polyarticular
Involving many joints. As opposed to monoarticular (affecting just one joint). From the Latin "articulus," meaning a joint. * * * SYN: multiarticular. [poly- + L. ...
polyasplenia
SYN: polysplenia. [blend of polysplenia and asplenia]
polyauxotroph
A mutant organism that requires several nutrients that are not required by the wild-type organism. Cf.:auxotroph, monoauxotroph.
polyavitaminosis
Avitaminosis with multiple deficiencies.
polybasic
Having more than one replaceable hydrogen atom, denoting an acid with a basicity greater than 1.
polyblennia
Excessive production of mucus. [poly- + G. blennos, mucus]
polycarbophil
A polyacrylic acid cross-linked with divinyl glycol; used as a gastrointestinal absorbent.
polycardia
SYN: tachycardia.
polycentric
Having several centers.
polycheiria, polychiria
Presence of supernumerary hands. [poly- + G. cheir, hand]
Polychlorinated biphenyls
PCBs, a mixture of up to 209 chlorinated chemicals which are no longer produced in the US but are still found in the environment. Health effects associated with exposure to PCBs ...
polychondritis
Inflammation of cartilage. [poly- + G. chondros, cartilage, + -itis, inflammation] - chronic atrophic p. SYN: relapsing p.. - relapsing p. a degenerative disease of cartilage ...
polychromasia
SYN: polychromatophilia.
polychromatic
Multicolored.
polychromatocyte
SYN: polychromatophil (2).
polychromatophil, polychromatophile
1. Staining readily with acid, neutral, and basic dyes; denoting certain cells, especially certain red blood cells. SYN: polychromatophilic. 2. A young or degenerating ...
polychromatophilia
1. A tendency of certain cells, such as the red blood cells in pernicious anemia, to stain with basic and also acid dyes. 2. Condition characterized by the presence of many red ...
polychromatophilic
SYN: polychromatophil (1).
polychromatosis
SYN: polychromatophilia.
polychromemia
An increase in the total amount of hemoglobin in the blood.
polychromia
Increased pigmentation in any part.
polychromophil
SYN: polychromatophil.
polychromophilia
SYN: polychromatophilia.
polychylia
An increased production of chyle. [poly- + G. chylos, chyle, + -ia, condition]
polycistronic
Pertaining to mRNA carrying information for the synthesis of more than one protein.
polyclinic
A dispensary for the treatment and study of diseases of all kinds. [poly- + G. kline, bed]
polyclonal
In immunochemistry, pertaining to proteins ( i.e., antibodies) from more than a single clone of cells, in contradistinction to monoclonal.
polyclonia
SYN: myoclonus multiplex. [poly- + G. klonos, tumult]
polycoria
The presence of two or more pupils in one iris. [poly- + G. kore, pupil]
polycrotic
Relating to or marked by polycrotism.
polycrotism
A condition in which the sphygmographic tracing shows several upward breaks in the descending wave. [poly- + G. krotos, a beat]
polycyesis
SYN: multiple pregnancy. [poly- + G. kyesis, pregnancy]
polycystic
Composed of many cysts.
Polycystic kidney disease
Genetic disorder characterized by the development of innumerable cysts in the kidneys. These cysts are filled with fluid, and replace much of the mass of the kidneys. This reduces ...
Polycystic ovarian (PCO) disease
Polycystic ovarian (PCO) disease, also known by the name Stein-Leventhal syndrome, is a hormonal problem that causes women to have a variety of signs and symptoms including: ...
Polycythemia
The presence of too many red blood cells. Polycythemia formally exists when the hemoglobin, red blood cell (RBC) count and total RBC volume are both above normal. For example, ...
polydactylism
SYN: polydactyly.
polydactylous
Relating to polydactyly.
Polydactyly
More than the normal number of fingers or toes. From the Greek “polys” (many) + “dactylos” (finger) = many fingers or, medically, too many fingers. Polydactyly is the ...
Polydactyly (hexadactyly)
The presence of an extra, sixth finger or toe, a very common congenital malformation (birth defect). This is called hexadactyly. The word hexadactyly literally means six ...
polydentia
SYN: polyodontia. [poly- + L. dens, tooth]
polydipsia
Excessive thirst that is relatively prolonged. [poly- + G. dipsa, thirst] - hysterical p. SYN: psychogenic p.. - psychogenic p. excessive fluid consumption resulting from a ...
polydispersoid
A colloid system in which the dispersed phase is composed of particles having different degrees of dispersion.
polydysplasia
Tissue development abnormal in several respects. [poly- + G. dys-, bad, + plasis, a molding]
polydystrophic
Relating to polydystrophy.
polydystrophy
A condition characterized by the presence of many congenital anomalies. [poly- + dystrophy] - pseudo-Hurler p. SYN: mucolipidosis III.
polyembryony
Condition of a zygote's giving rise to two or more embryos. [poly- + G. embryon, embryo]
polyendocrinopathy
A disease usually caused by insufficiency of multiple endocrine glands. See multiple endocrine deficiency syndrome.
Polyendocrinopathy syndrome, autoimmune
A genetic autoimmune disease with an extraordinary array of clinical features but characterized most often by at least 2 of the following 3 findings: hypoparathyroidism — ...
polyene
A chemical compound having a series of conjugated (alternating) double bonds; e.g., the carotenoids.
polyenic acids
SYN: polyenoic acids.
polyenoic acids
Fatty acids with more than one double bond in the carbon chain; e.g., linoleic, linolenic, and arachidonic acid s. SYN: polyenic acids.
polyergic
Capable of acting in several different ways. [poly- + G. ergon, work]
polyesthesia
A disorder of sensation in which a single touch or other stimulus is felt as several. [poly- + G. aisthesis, sensation]
polyestradiol phosphate
An estradiol phosphate polymer, used as a long-acting estrogen for treatment of prostatic carcinoma.
polyestrous
Having two or more estrous cycles in a mating season.
polyethylene glycols
Condensation polymers of ethylene oxide and water, of the general formula HO(CH2CH2O)nH, where n equals the average number of oxyethylene groups (300–6,000); they vary in ...
polyfructose
SYN: fructosan (1).
polygalactia
Excessive secretion of breast milk, especially at the weaning period. [poly- + G. gala, milk]
polygalacturonase
Pectin depolymerase; an enzyme catalyzing the random hydrolysis of 1,4-α-d-galactosiduronic linkages in pectate and other galacturonans. SYN: pectinase.
polyganglionic
Containing or involving many ganglia.
polygene
One of many genes that contribute to the phenotypic value of a measurable phenotype.
polygenic
Relating to a hereditary disease or normal characteristic controlled by the added effects of genes at multiple loci.
Polygenic diseases
Genetic disorders that are caused by the combined action of more than one gene. Examples of polygenic conditions include hypertension, coronary heart disease, diabetes, and ...
polyglactin 910
A synthetic absorbable suture for wound support of superficial approximation of the skin and mucosa.
polyglandular
SYN: pluriglandular.
Polyglandular autoimmune syndrome (PGA)
A genetic autoimmune disease with an extraordinary array of clinical features but characterized most often by at least 2 of the following 3 findings: hypoparathyroidism — ...
polyglutamate
SYN: poly(glutamic acid).
polygnathus
Unequal conjoined twins in which the parasite is attached to the jaw of the autosite. See conjoined twins, under twin. [poly- + G. gnathos, jaw]
polygraph
1. An instrument to obtain simultaneous tracings from several different sources; e.g., radial and jugular pulse, apex beat of the heart, phonocardiogram, electrocardiogram. The ...
polygyria
Condition in which the brain has an excessive number of convolutions. [poly- + G. gyros, circle, gyre]
polyhedral
Having many sides or facets. [G. polyedros, many-sided, fr. poly- + G. hedra, seat, facet]
polyhexoses
SYN: hexosans.
polyhidrosis
SYN: hyperhidrosis.
polyhybrid
The offspring of parents differing from each other in more than three characters.
polyhydramnios
SYN: hydramnios.
polyhydric
Containing more than one hydroxyl group, as in p. alcohols (glycerol, C3H5(OH)3) or p. acids (o-phosphoric acid, OP(OH)3).
polyhypermenorrhea
Frequent and excessive menstruation. [poly- + G. hyper, above, + men, month, + rhoia, flow]
polyhypomenorrhea
Frequent but scanty menstruation. [poly- + G. hypo, below, + men, month, + rhoia, a flow]
polyisoprenes
SYN: polyterpenes.
polyisoprenoids
SYN: polyterpenes.
polykaryocyte
A cell containing many nuclei, such as the osteoclast. [poly- + G. karyon, kernel, + kytos, cell]
polylactosamines
A class of glycoproteins containing repeating lactosamine units in their oligosaccharide components; the I/i blood group substances belong to this class.
polyleptic
Denoting a disease occurring in many paroxysms, e.g., malaria, epilepsy. [poly- + G. lepsis, a seizing]
polylinker
An inserted sequence of DNA in recombinant DNA vectors consisting of a cluster of numerous restriction endonuclease sites unique in the plasmid; also called restriction site ...
polylogia
Continuous and often incoherent speech. [poly- + G. logos, word]
polymastia
In humans, a condition in which more than two breasts are present. SYN: hypermastia (1), multimammae, pleomastia, pleomazia. [poly- + G. mastos, breast]
polymastigote
A mastigote having several grouped flagella. [poly- + G. mastix, a whip]
polymegethism
A greater than normal variation in the size of the cells of the human corneal endothelium.
polymelia
A developmental defect in which there are supernumerary limbs or parts of limbs. [poly- + G. melos, limb]
polymenorrhea
Occurrence of menstrual cycles of greater than usual frequency. [poly- + G. men, month, + rhoia, flow]
polymer
A substance of high molecular weight, made up of a chain of repeated units sometimes called “mers.” SEE ALSO: biopolymer. [see -mer (1)] - cross-linked p. a p. in which ...
polymerase
General term for any enzyme catalyzing a polymerization, as of nucleotides to polynucleotides, thus belonging to EC class 2, the transferases. - p. alpha a class of mammalian ...
Polymerase chain reaction (PCR)
A key technique in molecular genetics that permits the analysis of any short sequence of DNA (or RNA) without having to clone it. PCR is used to amplify selected sections of ...
polymerase α
SYN: polymerase alpha.
polymerase β
SYN: polymerase beta.
polymerase γ
SYN: polymerase gamma.
Polymerase, DNA
Enzyme that catalyzes (speeds) the polymerization of DNA. DNA polymerase uses preexisting nucleic acid templates and assembles the DNA from deoxyribonucleotides.
Polymerase, RNA
Enzyme that catalyzes (speeds) the polymerization of RNA. RNA polymerase uses preexisting nucleic acid templates and assembles the RNA from ribonucleotides.
polymeria
Condition characterized by an excessive number of parts, limbs, or organs of the body. [poly- + G. meros, part]
polymeric
1. Having the properties of a polymer. 2. Relating to or characterized by polymeria. 3. Rarely used synonym for polygenic.
polymerization
A reaction in which a high molecular weight product is produced by successive additions to or condensations of a simpler compound; e.g., polystyrene may be produced from styrene, ...
polymerize
To bring about polymerization.
polymetacarpalia, polymetacarpalism
Congenital anomaly characterized by the presence of supernumerary metacarpal bones.
polymetatarsalia, polymetatarsalism
Congenital anomaly characterized by the presence of supernumerary metatarsal bones.
polymicrolipomatosis
The occurrence of multiple small, nodular, fairly discrete masses of lipid in the subcutaneous connective tissue. [poly- + G. mikros, small, + lipoma + G. -osis, condition]
polymitus
SYN: exflagellation. [poly- + G. mitos, thread]
polymorph
Colloquial term for polymorphonuclear leukocyte.
Polymorphic
Pertaining to a polymorphism, a variation in the DNA that is too common to be due merely to new mutation. A polymorphism must have a frequency of at least 1% in the population. ...
Polymorphism
A variation in the DNA that is too common to be due merely to new mutation. A polymorphism must have a frequency of at least 1% in the population. Examples of polymorphisms ...
polymorphocellular
Relating to or formed of cells of several different kinds. [G. polymorphos, multiform, + L. cellula, cell]
polymorphonuclear
Having nuclei of varied forms; denoting a variety of leukocyte. [G. polymorphos, multiform, + L. nucleus, kernel]
Polymorphonuclear leukocyte
A type of white blood cell with a nucleus that is so deeply lobated or divided that the cell looks to have multiple nuclei. Informally called a poly.
polymorphous
SYN: polymorphic.
polymyalgia
Pain in several muscle groups. [poly- + G. mys, muscle, + algos, pain] - p. arteritica p. rheumatica resulting from arteritis, especially disseminated giant cell arteritis. - ...
Polymyalgia rheumatica (PMR)
A disorder of the muscles and joints of older persons characterized by pain and stiffness, affecting both sides of the
polymyoclonus
SYN: myoclonus multiplex.
Polymyositis
A chronic inflammatory disease of muscle that begins when white blood cells, the immune cells of inflammation, spontaneously invade muscles, especially the muscles closest to the ...
polymyxin
A mixture of antibiotic substances obtained from cultures of Bacillus polymyxa (B. serosporus), an organism found in water and soils and obtainable as a crystalline ...
polynesic
Occurring in many separate foci; denoting certain forms of inflammation or infection. [poly- + G. nesos, island]
polyneural
Relating to, supplied by, or affecting several nerves. [poly- + G. neuron, nerve]
polyneuralgia
Neuralgia of several nerves simultaneously.
polyneuritis
SYN: polyneuropathy (2). - acute idiopathic p. SYN: Guillain- Barré syndrome. - chronic familial p. inflammation of nerves related to infiltration by amyloid. - infectious p. ...
Polyneuritis, acute idiopathic
Also known as the Guillain-Barre syndrome, a disorder characterized by progressive symmetrical paralysis and loss of reflexes usually beginning in the legs with, in most cases, ...
polyneuronitis
Inflammation of several groups of nerve cells.
polyneuropathy
1. A disease process involving a number of peripheral nerves (literal sense). 2. A nontraumatic generalized disorder of peripheral nerves, affecting the distal fibers most ...
polynoxylin
Poly(methylenebis[N,N′-di(hydroxymethyl)urea]); a polymer of urea with formaldehyde, used as a topical antiseptic.
polynuclear, polynucleate
SYN: multinuclear.
polynucleosis
The presence of numbers of polynuclear, or multinuclear, cells in the peripheral blood. SYN: multinucleosis.
polynucleotidases
1. Enzymes catalyzing the hydrolysis of polynucleotides to oligonucleotides or to mononucleotides; e.g., phosphodiesterases, nucleases. 2. Terms once applied to the two ...
polynucleotide
A linear polymer containing an indefinite (usually large) number of nucleotides, linked from one ribose (or deoxyribose) to another via phosphoric residues. ...
polynucleotide methylases
SYN: polynucleotide methyltransferases.
polyodontia
Presence of supernumerary teeth. SYN: polydentia. [poly- + G. odous, tooth]
polyol
Polyhydroxy alcohol; a sugar that contains many —OH (-ol) groups, such as the sugar alcohol s and inositols. - p. dehydrogenases oxidizing enzymes that catalyze the ...
Polyomavirus
A genus of viruses (family Papovaviridae) containing DNA (MW 3 × 106), having virions about 45 nm in diameter, and including viruses oncogenic for animals; includes the polyoma ...
polyoncosis, polyonchosis
Formation of multiple tumors. [poly- + G. onkos, tumor, + -osis, condition]
polyonychia
Presence of supernumerary nails on fingers or toes. SYN: polyunguia. [poly- + G. onyx, nail]
polyopia, polyopsia
The perception of several images of the same object. SYN: multiple vision. [poly- + G. ops, eye]
polyorchism, polyorchidism
Presence of one or more supernumerary testes. [poly- + G. orchis, testis]
polyostotic
Involving more than one bone. [poly- + G. osteon, bone]
Polyostotic fibrous dysplasia
A genetic disorder of bones, skin pigmentation and hormonal problems with premature sexual development. Also called McCune-Albright syndrome or the Albright syndrome. In the ...
polyotia
Presence of a supernumerary auricle on one or both sides of the head. [poly- + G. ous, ear]
polyovular
Containing more than one ovum.
polyovulatory
Discharging several ova in one ovulatory cycle. SYN: polyzygotic.
polyoxyl 40 stearate
A mixture of the monostearate and distearate esters of a condensation polymer, H(OCH2CH2)n OCOC16H32CH3 (n is approximately 40); it is a nonionic surface-active agent used as ...
polyp
A general descriptive term used with reference to any mass of tissue that bulges or projects outward or upward from the normal surface level, thereby being macroscopically visible ...
polypapilloma
Multiple papillomas.
polypathia
A multiplicity of diseases or disorders. [poly- + G. pathos, disease]
polypectomy
Excision of a polyp. [polyp + G. ektome, excision] - p. snare a wire loop device designed to slip over a polyp and, upon closure, result in transection of the polyp stalk.
Polypeptide
A compound consisting of 2 or more amino acids. Amino acids make up polypeptides which, in turn, make up proteins. * * * A peptide formed by the union of an indefinite (usually ...
polyphagia
Excessive eating; gluttony. [poly- + G. phago, to eat]
polyphalangism
SYN: hyperphalangism.
polyphallic
Pertaining to the fantasy of possessing multiple penises.
polypharmacy
The administration of many drugs at the same time. SEE ALSO: shotgun prescription.
polyphenic
SYN: pleiotropic. [poly- + G. phaino, to display]
Polyphenol
A kind of chemical that (at least in theory) may protect against some common health problems and possibly certain effects of aging. Polyphenols act as antioxidants. They protect ...
polyphenol oxidase
SYN: laccase.
polyphobia
Morbid fear of many things; a condition marked by the presence of many phobias. [poly- + G. phobos, fear]
polyphosphorylase
SYN: phosphorylase.
polyphrasia
Extreme talkativeness. See logorrhea. [poly- + G. phrasis, speech]
polyphyletic
1. Derived from more than one source, or having several lines of descent, in contrast to monophyletic. 2. In hematology, relating to polyphyletism.
polyphyletism
In hematology, the theory that blood cells are derived from several different stem cells, depending on the particular cell type. SYN: polyphyletic theory. [poly- + G. phyle, ...
polyphyodont
Having several sets of teeth formed in succession throughout life. [poly- + G. phyo, to produce, + odous (odont-), tooth]
polypi
Plural of polypus.
polypiform
SYN: polypoid.
polyplasmia
SYN: hydremia.
polyplastic
1. Formed of several different structures. 2. Capable of assuming several forms. [poly- + G. plastikos, plastic]
Polyplax
A sucking louse (order Anoplura) of rats and mice. The species P. serratus (the mouse louse) has been shown experimentally to be capable of transmitting tularemia and may ...
Polyploid
Three or more full sets of chromosomes. A polyploid brain tumor cell might for example have 69 or 92 chromosomes. * * * Characterized by or pertaining to polyploidy.
polyploidy
The state of a cell nucleus containing three or more haploid sets. Cells containing three, four, five, or six multiples are referred to, respectively, as triploid, tetraploid, ...
polypnea
SYN: tachypnea. [poly- + G. pnoia, breath]
polypodia
Presence of supernumerary feet.
polypoid
Resembling a polyp in gross features. SYN: polypiform. [polyp + G. eidos, resemblance]
polyporous
SYN: cribriform. [poly- + G. poros, pore]
Polyporus
A genus of mushrooms. See agaric. [poly- + G. poros, pore]
polyposia
Rarely used term for sustained, excessive consumption of liquids. [poly- + G. posis, drinking]
polyposis
Presence of several polyps. [polyp + G. -osis, condition] - adenomatous p. coli SYN: familial adenomatous p.. - familial adenomatous p. (FAP) [MIM*175100] p. that usually ...
polypotome
An instrument used for cutting away a polyp. [polyp + G. tomos, cutting]
polypotrite
An instrument for crushing polyps. [polyp + L. tero, pp. tritus, to rub]
polypous
Pertaining to, manifesting the gross features of, or characterized by the presence of a polyp or polyps.
polypragmasy
Administration of many different remedies at the same time. [poly- + G. pragma, a thing]
polyprenols
Acyclic polyisoprene alcohols.
Polypsis of the colon
Multiple polyps with a high malignant potential in the large bowel. This hereditary condition is also known as polypsis coli and Familial Adenomatous Polyposis (FAP).
polyptychial
Folded or arranged so as to form more than one layer. [G. polyptychos, having many folds or layers, fr. poly- + ptyche, fold or layer]
polypus
SYN: polyp. [L.]
polyradiculitis
SYN: polyradiculopathy.
polyradiculomyopathy
Coexisting polyradiculopathy and myopathy.
polyradiculoneuropathy
1. Literally, a disease process that affects roots and peripheral nerves. 2. A nontraumatic, usually sporadic, generalized disorder of nerve roots and peripheral nerves, which ...
polyradiculopathy
Diffuse root involvement; seen with, among other disorders, diabetic neuropathy ( diabetic p.). SYN: polyradiculitis. - diabetic p. an inclusive term for several types of ...
polyribonucleotide nucleotidyltransferase
An enzyme-catalyzing phosphorolysis of polyribonucleotides or of RNA, yielding nucleoside diphosphates (or the reverse, the first artificial polynucleotide formation ...
polyribosomes
Conceptually, two or more ribosomes connected by a molecule of messenger RNA; structures satisfying this concept can be seen in electron micrographs and can be sedimented at ...
polyrrhea
Profuse discharge of serous or other fluid. [poly- + G. rhoia, a flow]
polysaccharide
A carbohydrate containing a large number of saccharide groups; e.g., starch. Cf.:oligosaccharide. SYN: glycan. - pneumococcal p. SYN: specific capsular substance. - specific ...
polyscelia
A form of polymelia involving the presence of more than two legs. [poly- + G. skelos, leg]
polyscope
SYN: diaphanoscope.
polyserositis
Chronic inflammation with effusions in several serous cavities; can result in fibrous thickening of the serosa, including constrictive pericarditis. SYN: Bamberger disease (2), ...
polysinusitis
Simultaneous inflammation of two or more sinuses.
polysomes
SYN: polyribosomes.

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