| polyalveolar lobe | A type of congenital anomaly where a severalfold increase in the total alveolar number leads to congenital lobar emphysema. (05 Mar 2000) |
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| polyamine | A polymer of an amine. 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 polyamine's arise by bacterial action on protein; many are normally occurring body constituents of wide distribution, or are essential growth factors for microorganisms. Origin: G. Polys, much, many + amine (05 Mar 2000) |
| polyamine oxidase | <enzyme> Aminoacetone is oxidatively deaminated to methylglyoxal; spermidine gives putrescine and 3-aminopropionaldehyde; spermine gives spermidine and 3-aminopropionaldehyde Registry number: EC 1.5.3.3 Synonym: spermine oxidase, spermidine oxidase, aminoacetone oxidase (26 Jun 1999) |
| polyamine-methylene resin | A synthetic acid-binding resin used as a gastric antacid. (05 Mar 2000) |
| polyamino acids | Polypeptides that are polymers of aminoacyl groups, i.e., of -NH-CHR-CO-; typically, a term used with homopolymers. See: poly-. (05 Mar 2000) |
| polyandria | <botany> A Linnaean class of monoclinous or hermaphrodite plants, having many stamens, or any number above twenty, inserted in the receptacle. Origin: NL. See Polyandry. Source: Websters Dictionary (01 Mar 1998) |
| polyandrian | <botany> Polyandrous. Source: Websters Dictionary (01 Mar 1998) |
| polyandric | Pertaining to, or characterised by, polyandry; mating with several males. "Polyandric societies." Origin: Cf. Polyandrique. Source: Websters Dictionary (01 Mar 1998) |
| polyandrous | <botany> Belonging to the class Polyandria; having many stamens, or any number above twenty, inserted in the receptacle. Source: Websters Dictionary (01 Mar 1998) |
| polyandry | 1. <plant biology> Describes the condition of a plant whose flowers have many stamens (male pollen-producing structures). 2. Describes the practice of a woman having two or more husbands at the same time. (09 Oct 1997) |
| polyanetholesulfonate | <chemical> (e)-1-methoxy-4-(1-propenyl)benzene homopolymer, sulfonated, sodium salt. A compound originally developed as an anticoagulant, but possessing anticomplement action and lowering the bactericidal action of blood. It is used in vitro to inhibit blood coagulation and as a diagnostic reagent to encourage the growth of pathogens in the blood. It is also used to stabilise colloidal solutions such as milk and gelatin. Chemical name: Benzene, 1-methoxy-4-(1-propenyl)-, (E)-, homopolymer, sulfonated, sodium salt (12 Dec 1998) |
| polyangiitis | Inflammation of multiple blood vessels involving more than one type of vessel, e.g., arteries and veins, or arterioles and capillaries. (05 Mar 2000) |
| polyanion | <biochemistry> Macromolecule carrying many negative charges. The commonest in cell biological systems is nucleic acid. (11 Jan 1998) |
| polyanthus | <botany> The oxlip. So called because the peduncle bears a many-flowered umbel. See Oxlip. A bulbous flowering plant of the genus Narcissus (N. Tazetta, or N. Polyanthus of some authors). Origin: NL, fr. Gr. Rich in flowers; many + flower Source: Websters Dictionary (01 Mar 1998) |
| polyarteritis | Simultaneous inflammation of a number of arteries. (05 Mar 2000) |