| pteroceras | <zoology> A genus of large marine gastropods having the outer border of the lip divided into lobes. Synonym: scorpion shell. Origin: NL, fr. Gr. A wing + a horn. Source: Websters Dictionary (01 Mar 1998) |
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| pterocletes | <ornithology> A division of birds including the sand grouse. They are in some respects intermediate between the pigeons and true grouse. Synonym: Pteroclomorphae. Origin: NL, fr Pterocles, the typical genus, fr. Gr. Feather +, a key, tongue of a clasp. Source: Websters Dictionary (01 Mar 1998) |
| pterodactyl | <paleontology> An extinct flying reptile; one of the Pterosauria. Origin: Gr. A wing + finger, toe: cf. F. Pterodactyle. Source: Websters Dictionary (01 Mar 1998) |
| pterodactyli | <paleontology> Same as Pterosauria. Source: Websters Dictionary (01 Mar 1998) |
| pteroglossal | <zoology> Having the tongue finely notched along the sides, so as to have a featherlike appearance, as the toucans. Origin: Gr. A feather + tongue. Source: Websters Dictionary (01 Mar 1998) |
| pteroic acid | A constituent of folic acid, containing p-aminobenzoic acid and pteridine linked by a -CH2-group between the amino group of the former and C-6 of the latter. (05 Mar 2000) |
| pteron | <anatomy> The region of the skull, in the temporal fossa back of the orbit, where the great wing of the sphenoid, the temporal, the parietal, and the frontal hones approach each other. Origin: NL, fr. Gr. A wing. Source: Websters Dictionary (01 Mar 1998) |
| pteropappi | <zoology> Same as Odontotormae. Origin: NL, from Gr. A feather, a bird + a grandfather. Source: Websters Dictionary (01 Mar 1998) |
| pterophore | <zoology> Any moth of the genus Pterophorus and allied genera; a plume moth. See: Plume moth, under Plume. Origin: Gr. A feather + to bear. Source: Websters Dictionary (01 Mar 1998) |
| pteropod | <zoology> One of the Pteropoda. Origin: Gr. Wing-footed; a feather, wing +, foot: cf. F. Pteropode. Source: Websters Dictionary (01 Mar 1998) |
| pteropoda | <zoology> A class of Mollusca in which the anterior lobes of the foot are developed in the form of broad, thin, winglike organs, with which they swim at near the surface of the sea. The Pteropoda are divided into two orders: Cymnosomata, which have the body entirely naked and the head distinct from the wings; and Thecosomata, which have a delicate transparent shell of various forms, and the head not distinct from the wings. Source: Websters Dictionary (01 Mar 1998) |
| pteropodous | <zoology> Of or pertaining to the Pteropoda. Source: Websters Dictionary (01 Mar 1998) |
| pteropterin | Pteroyl-gamma-glutamyl-gamma-glutamylglutamic acid;a folic acid conjugate, a principle chemically similar to folic acid except that it contains three molecules of glutamic acid instead of one, in g linkage. Synonym: fermentation Lactobacillus casei factor, pteroyltriglutamic acid. (05 Mar 2000) |
| pterosaur | <paleontology> A pterodactyl. Origin: Gr. Wind + a lizard. Source: Websters Dictionary (01 Mar 1998) |
| pterosauria | <paleontology> An extinct order of flying reptiles of the Mesozoic age; the pterodactyls. Synonym: Pterodactyli, and Ornithosauria. The wings were formed, like those of bats, by a leathery expansion of the skin, principally supported by the greatly enlarged outer or " little" fingers of the hands. The American Cretaceous pterodactyls had no teeth. See: Pteranodontia, and Pterodactyl. Source: Websters Dictionary (01 Mar 1998) |