| pichurim bean | <botany> The seed of a Brazilian lauraceous tree (Nectandra Puchury) of a taste and smell between those of nutmeg and of sassafras, sometimes used medicinally. Synonym: sassafras nut. Source: Websters Dictionary (01 Mar 1998) |
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| pici | <ornithology> A division of birds including the woodpeckers and wry necks. Origin: NL, fr. L. Picus a woodpecker. Source: Websters Dictionary (01 Mar 1998) |
| picibanil | <chemical> A lyophilised preparation of a low-virulence strain (su) of streptococcus pyogenes (s. Haemolyticus), inactivated by heating with penicillin G. It has been proposed as a noncytotoxic antineoplastic agent because of its immune system-stimulating activity. Pharmacological action: antineoplastic agent. Chemical name: Picibanil (12 Dec 1998) |
| piciform | <zoology> Of or pertaining to Piciformes. Source: Websters Dictionary (01 Mar 1998) |
| piciformes | <ornithology> A group of birds including the woodpeckers, toucans, barbets, colies, kingfishes, hornbills, and some other related groups. Origin: NL. See Picus, and -Form. Source: Websters Dictionary (01 Mar 1998) |
| picine | <zoology> Of or pertaining to the woodpeckers (Pici), or to the Piciformes. Source: Websters Dictionary (01 Mar 1998) |
| pick | 1. To throw; to pitch. "As high as I could pick my lance." (Shak) 2. To peck at, as a bird with its beak; to strike at with anything pointed; to act upon with a pointed instrument; to pierce; to prick, as with a pin. 3. To separate or open by means of a sharp point or points; as, to pick matted wool, cotton, oakum, etc. 4. To open (a lock) as by a wire. 5. To pull apart or away, especially with the fingers; to pluck; to gather, as fruit from a tree, flowers from the stalk, feathers from a fowl, etc. 6. To remove something from with a pointed instrument, with the fingers, or with the teeth; as, to pick the teeth; to pick a bone; to pick a goose; to pick a pocket. "Did you pick Master Slender's purse?" (Shak) "He picks clean teeth, and, busy as he seems With an old tavern quill, is hungry yet." (Cowper) 7. To choose; to select; to separate as choice or desirable; to cull; as, to pick one's company; to pick one's way; often with out. "One man picked out of ten thousand." 8. To take up; especially, to gather from here and there; to collect; to bring together; as, to pick rags; often with up; as, to pick up a ball or stones; to pick up information. 9. To trim. To pick at, to tease or vex by pertinacious annoyance. To pick a bone with. See Bone. To pick a thank, to curry favor. To pick off. To pluck; to remove by picking. To shoot or bring down, one by one; as, sharpshooters pick off the enemy. To pick out. To mark out; to variegate; as, to pick out any dark stuff with lines or spots of bright colours. To select from a number or quantity. To pick to pieces, to pull apart piece by piece; hence, to analyze; especially, to criticize in detail. To pick a quarrel, to give occasion of quarrel intentionally. To pick up. To take up, as with the fingers. To get by repeated efforts; to gather here and there; as, to pick up a livelihood; to pick up news. Origin: OE. Picken, pikken, to prick, peck; akin to Icel. Pikka, Sw. Picka, Dan. Pikke, D. Pikken, G. Picken, F. Piquer, W. Pigo. Cf. Peck, Pike, Pitch to throw. 1. A sharp-pointed tool for picking; often used in composition; as, a toothpick; a picklock. 2. <chemical> A heavy iron tool, curved and sometimes pointed at both ends, wielded by means of a wooden handle inserted in the middle, used by quarrymen, roadmakers, etc.; also, a pointed hammer used for dressing millstones. 3. A pike or spike; the sharp point fixed in the center of a buckler. "Take down my buckler . . . And grind the pick on 't." 4. Choice; right of selection; as, to have one's pick. "France and Russia have the pick of our stables." (Ld. Lytton) 5. That which would be picked or chosen first; the best; as, the pick of the flock. 6. A particle of ink or paper imbedded in the hollow of a letter, filling up its face, and occasioning a spot on a printed sheet. 7. That which is picked in, as with a pointed pencil, to correct an unevenness in a picture. 8. The blow which drives the shuttle, the rate of speed of a loom being reckoned as so many picks per minute; hence, in describing the fineness of a fabric, a weft thread; as, so many picks to an inch. Pick dressing, in cut stonework, a facing made by a pointed tool, leaving the surface in little pits or depressions. Pick hammer, a pick with one end sharp and the other blunt, used by miners. Origin: F. Pic a pickax, a pick. See Pick, and cf. Pike. Source: Websters Dictionary (01 Mar 1998) |
| pick bodies | A histologic finding in Niemann-Pick disease. Large rounded collections of material (sphingomyelin) are seen within mononuclear cells. (27 Sep 1997) |
| Pick cell | A relatively large, rounded or polygonal, mononuclear cell, with indistinctly or palely staining, foamlike cytoplasm that contains numerous droplets of a phosphatide, sphingomyelin; such cell's are widely distributed in the spleen and other tissues, especially those rich in reticuloendothelial components, in patients with Niemann-Pick disease. Synonym: Niemann-Pick cell. (05 Mar 2000) |
| Pick's atrophy | Circumscribed atrophy of the cerebral cortex. Synonym: lobar sclerosis, progressive circumscribed cerebral atrophy. (05 Mar 2000) |
| Pick's bodies | Intracytoplasmic argentophilic inclusion body's seen in neurons in Pick's disease. (05 Mar 2000) |
| Pick's bundle | A bundle of nerve fibres recurving rostralward from the pyramidal tract in the medulla oblongata, and believed to consist of corticonuclear fibres. (05 Mar 2000) |
| pick's disease | A form of dementia characterised by a slowly progressive deterioration of social skills and changes in personality leading to impairment of intellect, memory, and language. (12 Dec 1998) |
| Pick's syndrome | A form of dementia characterised by a slowly progressive deterioration of social skills and changes in personality leading to impairment of intellect, memory, and language. (12 Dec 1998) |
| Pick's tubular adenoma | A neoplasm of the ovary, arising from the ovarian stroma, mimicking to a greater or lesser extent derivatives of the sex cord mesenchyme of the testis, and sometimes causing defeminization and virilization. (12 Dec 1998) |