| polyplastic | <biology> Assuming, or having the power of assuming, many forms; as, a polyplastic element which does not preserve its original shape. Origin: Poly- + -plastic. Source: Websters Dictionary (01 Mar 1998) |
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| Polyplax | A sucking louse (order Anoplura) of rats and mice. The species Polyplax serratus (the mouse louse) has been shown experimentally to be capable of transmitting tularaemia and may also be a vector for murine typhus and Trypanosoma lewisi. Origin: poly-+ G. Plax, plate, plaque (05 Mar 2000) |
| polyploid | Of a nucleus, cell or organism that has more than two haploid sets of chromosomes. A cell with three haploid sets (3n) is termed triploid, four sets (4n) tetraploid and so on. (18 Nov 1997) |
| polyploidy | The chromosomal constitution of a cell containing multiples of the normal number of chromosomes; includes triploidy (symbol: 3n), tetraploidy (symbol: 4n), etc. (12 Dec 1998) |
| polypnea | Synonym: tachypnea. Origin: poly-+ G. Pnoia, breath (05 Mar 2000) |
| polypode | <botany> A plant of the genus Polypodium; polypody. Alternative forms: polypod. Origin: Cf. F. Polypode. See Polypody. <zoology> An animal having many feet; a myriapod. Origin: Gr, the wood louse, milleped: cf. F. Polypode. See Polyp. Source: Websters Dictionary (01 Mar 1998) |
| polypodia | Presence of supernumerary feet. (05 Mar 2000) |
| polypodial | Adjective describing an amoeba with several pseudopods. (18 Nov 1997) |
| polypodium | <botany> A genus of plants of the order Filices or ferns. The fructifications are in uncovered roundish points, called sori, scattered over the inferior surface of the frond or leaf. There are numerous species. Origin: L, fr. Gr, dim. Of . See Polyp, and cf. 2d Polypode. Source: Websters Dictionary (01 Mar 1998) |
| polypody | <botany> Any plant of the genus Polypodium. Source: Websters Dictionary (01 Mar 1998) |
| polypoid | 1. <zoology> Like a polyp; having the nature of a polyp, but lacking the tentacles or other parts. 2. <medicine> Resembling a polypus in appearance; having a character like that of a polypus. Origin: Polyp. Source: Websters Dictionary (01 Mar 1998) |
| polypoid adenoma | A polyp that consists of benign neoplastic tissue derived from glandular epithelium. Synonym: cellular polyp, polypoid adenoma. (05 Mar 2000) |
| polypoid gallbladder lesions | <radiology> Cholesterol polyp, adenoma, papilloma (usually less than 1 cm, may be premalignant), carcinoma, metastasis, adenomyomatosis, tumefactive sludge, inflammatory polyp (12 Dec 1998) |
| polypomedusae | <zoology> Same as Hydrozoa. Origin: NL. See Polyp, and Medusa. Source: Websters Dictionary (01 Mar 1998) |
| polyporaceae | A class of basidiomycetous fungi, order aphyllophorales, living in decaying plant matter and timber. (12 Dec 1998) |