| Papanicolaou, George | <person> Greek-U.S. Physician, anatomist, and cytologist, 1883-1962. See: Pap smear, Pap test, Papanicolaou examination, Papanicolaou smear, Papanicolaou smear test, Papanicolaou stain. (05 Mar 2000) |
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| papaphobia | <psychology> Intense fear or dread of the pope, or of the Roman Catholic Church. Origin: Gr. Phobos = fear (16 Mar 1998) |
| papaver | <botany> A genus of plants, including the poppy. Origin: L, poppy. Source: Websters Dictionary (01 Mar 1998) |
| papaveraceous | <botany> Of, pertaining to, or resembling, a natural order of plants (Papaveraceae) of which the poppy, the celandine, and the bloodroot are well-known examples. Source: Websters Dictionary (01 Mar 1998) |
| papaveretum | A preparation of water soluble opium alkaloids, including 50% anhydrous morphine. Origin: L. Papaver, poppy (05 Mar 2000) |
| papaverine | <chemistry> An alkaloid found in opium. It has a weaker therapeutic action than morphine. Source: Websters Dictionary (01 Mar 1998) |
| papaw | 1. <botany> A tree (Carica Papaya) of tropical America, belonging to the order Passifloreae. It has a soft, spongy stem, eighteen or twenty feet high, crowned with a tuft of large, long-stalked, palmately lobed leaves. The milky juice of the plant is said to have the property of making meat tender. Also, its dull orange-coloured, melon-shaped fruit, which is eaten both raw and cooked or pickled. 2. <botany> A tree of the genus Asimina (A. Triloba), growing in the western and southern parts of the United States, and producing a sweet edible fruit; also, the fruit itself. Origin: Prob. From the native name in the West Indies; cf. Sp. Papayo papaw, papaya the fruit of the papaw Alternative forms: pawpaw. Source: Websters Dictionary (01 Mar 1998) |
| papaya | The fruit of the papaw (pawpaw), Carica papaya (family Caricaceae), a tree of tropical America; it possesses a proteolytic action and is the source of papain. Synonym: carica. Origin: Sp. (05 Mar 2000) |
| papayotin | <enzyme> Thiol protease from Carica papaya (pawpaw). Thermostable and will act in the presence of denaturing agents. Although it will cleave a variety of peptide bonds there is greatest activity one residue towards the C terminus from a phenylalanine. (18 Nov 1997) |
| papboat | 1. A kind of sauce boat or dish. 2. <zoology> A large spiral East Indian marine shell (Turbinella rapha); so called because used by native priests to hold the oil for anointing. Source: Websters Dictionary (01 Mar 1998) |
| paper | 1. A substance in the form of thin sheets or leaves intended to be written or printed on, or to be used in wrapping. It is made of rags, straw, bark, wood, or other fibrous material, which is first reduced to pulp, then molded, pressed, and dried. 2. A sheet, leaf, or piece of such substance. 3. A printed or written instrument; a document, essay, or the like; a writing; as, a paper read before a scientific society. "They brought a paper to me to be signed." (Dryden) 4. A printed sheet appearing periodically; a newspaper; a journal; as, a daily paper. 5. Negotiable evidences of indebtedness; notes; bills of exchange, and the like; as, the bank holds a large amount of his paper. 6. Decorated hangings or coverings for walls, made of paper. See Paper hangings, below. 7. A paper containing (usually) a definite quantity; as, a paper of pins, tacks, opium, etc. 8. A medicinal preparation spread upon paper, intended for external application; as, cantharides paper. Paper is manufactured in sheets, the trade names of which, together with the regular sizes in inches, are shown in the following table. But paper makers vary the size somewhat. In the manufacture of books, etc, a sheet, of whatever size originally, is termed, when folded once, a folio; folded twice, a quarto, or 4to; three times, an octavo, or 8vo; four times, a sextodecimo, or 16mo; five times, a 32mo; three times, with an offcut folded twice and set in, a duodecimo, or 12mo; four times, with an offcut folded three times and set in, a 24mo. Paper is often used adjectively or in combination, having commonly an obvious signification; as, paper cutter or paper-cutter; paper knife, paper-knife, or paperknife; paper maker, paper-maker, or papermaker; paper mill or paper-mill; paper weight, paper-weight, or paperweight, etc. Business paper, checks, notes, drafts, etc, given in payment of actual indebtedness; opposed to accommodation paper. Fly paper, paper covered with a sticky preparation, used for catching flies. Laid paper. See Laid. <botany> Paper birch, any wasp which makes a nest of paperlike material, as the yellow jacket. Paper weight, any object used as a weight to prevent loose papers from being displaced by wind, or otherwise. Parchment paper. See Papyrine. Tissue paper, thin, gauzelike paper, such as is used to protect engravings in books. Wall paper. Same as Paper hangings, above. Waste paper, paper thrown aside as worthless or useless, except for uses of little account. Wove paper, a writing paper with a uniform surface, not ribbed or watermarked. Origin: F. Papier, fr. L. Papyrus papyrus, from which the Egyptians made a kind of paper, Gr. Cf. Papyrus. Source: Websters Dictionary (01 Mar 1998) |
| paper chromatography | <technique> Separation method in which filter paper is used as the support. A type of chromatography in which the stationary phase is a sheet of special-grade filter paper. It is in all other aspects similar to thin-layer chromatography. Not a very sensitive method, but historically important as one of the first methods available for separating natural compounds. (07 Mar 2000) |
| paper mill worker's disease | <chest medicine> Extrinsic allergic alveolitis caused by moldy wood pulp containing spores of Alternaria fungi. (05 Mar 2000) |
| paper plate | A thin plate of ethmoid bone forming part of the medial wall of the orbit and the lateral wall for the ethmoidal labyrinth. Synonym: lamina orbitalis ossis ethmoidalis, lamina papyracea, orbital lamina of ethmoid bone, orbital layer of ethmoid bone, orbital plate, paper plate, papyraceous plate. (05 Mar 2000) |
| Papez circuit | A long circuitous conduction chain in the mammalian forebrain, leading from the hippocampus by way of the fornix to the mammillary body and thence returning to the hippocampus by way of, sequentially, the anterior thalamic nuclei, cingulate gyrus, and parahippocampal gyrus. (05 Mar 2000) |