| piperylene | <chemistry> A hydrocarbon obtained by decomposition of certain piperidine derivatives. Origin: Piperidine + acetylene. Source: Websters Dictionary (01 Mar 1998) |
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| PIPES | <abbreviation> Piperazine diethanesulfonic acid. (05 Mar 2000) |
| pipestem arteries | Artery's hardened by calcification as seen in Monckeberg's arteriosclerosis; descriptive of the characteristic feeling to the finger of an examiner. (05 Mar 2000) |
| pipestem fibrosis | A characteristic pipe-shaped fibrosis formed around hepatic portal veins in some cases of long-continued heavy infection with Schistosoma mansoni; thought to be induced by the presence of large numbers of schistosome eggs in the hepatic tissues. Synonym: Symmers' clay pipestem fibrosis, Symmers' fibrosis. (05 Mar 2000) |
| pipette | A graduated tube (marked in ml) used to transport a definite volume of a gas or liquid in laboratory work. Origin: Fr. Dim. Of pipe, pipe (05 Mar 2000) |
| pipevine | <botany> The Dutchman's pipe. See Dutchman. Source: Websters Dictionary (01 Mar 1998) |
| pipewort | <botany> Any plant of a genus (Eriocaulon) of aquatic or marsh herbs with soft grass-like leaves. Source: Websters Dictionary (01 Mar 1998) |
| pipidae | A family of the order anura, distinguished by the lack of a tongue. It includes four living genera of aquatic "toads". Two of the most familiar pipids are the popularly called surinam "toad" (pipa pipa) and xenopus laevis. (12 Dec 1998) |
| piping | 1. A small cord covered with cloth, used as trimming for women's dresses. 2. Pipes, collectively; as, the piping of a house. 3. The act of playing on a pipe; the shrill noted of birds, etc. 4. A piece cut off to be set or planted; a cutting; also, propagation by cuttings. 1. Playing on a musical pipe. "Lowing herds and piping swains." 2. Peaceful; favorable to, or characterised by, the music of the pipe rather than of the drum and fife. 3. Emitting a high, shrill sound. 4. Simmering; boiling; sizzling; hissing; from the sound of boiling fluids. Piping crow, Piping crow shrike, Piping roller, a small American tree frog (Hyla Pickeringii) which utters a high, shrill note in early spring. Piping hot, boiling hot; hissing hot; very hot. Origin: From Pipe. Source: Websters Dictionary (01 Mar 1998) |
| pipistrelle | <zoology> A small European bat (Vesperugo pipistrellus). Synonym: flittermouse. Origin: F. Pipistrelle, It. Pipistrello. Source: Websters Dictionary (01 Mar 1998) |
| pipit | <ornithology> Any one of numerous species of small singing birds belonging to Anthus and allied genera, of the family Motacillidae. They strongly resemble the true larks in habits, colours, and the great length of the hind claw. They are, therefore, often called titlarks, and pipit larks. The meadow pipit (Anthus pratensis); the tree pipit, or tree lark (A. Trivialis); and the rock pipit, or sea lark (A. Obscurus) are well-known European species. The common American pipit, or brown lark, is Anthus Pensilvanicus. The Western species (A. Spraguei) is called the American skylark, on account of its musical powers. Origin: So named from its call note. Source: Websters Dictionary (01 Mar 1998) |
| pipobroman | <chemical> An antineoplastic alkylating agent used in the treatment of polycythemia vera, administered orally. Pharmacological action: antineoplastic agent, alkylating. Chemical name: Piperazine, 1,4-bis(3-bromo-1-oxopropyl)- (12 Dec 1998) |
| piposulfan | 1,4-Dihydracryloylpiperazine dimethanesulfonate;an antineoplastic agent. (05 Mar 2000) |
| pipotiazine palmitate | This antipsychotic drug is used to treat chronic schizophrenia. (09 Oct 1997) |
| pippin | <botany> An apple from a tree raised from the seed and not grafted; a seedling apple. A name given to apples of several different kinds, as Newtown pippin, summer pippin, fall pippin, golden pippin. "We will eat a last year's pippin." (Shak) Normandy pippins, sun-dried apples for winter use. Origin: Probably fr. OE. Pippin a seed, as being raised from the seed. See Pip a seed. Source: Websters Dictionary (01 Mar 1998) |