| pillars of fornix | The columna fornicis and crus fornicis. (05 Mar 2000) |
|---|---|
| pillet | A small pill. (05 Mar 2000) |
| pillion | A panel or cushion saddle; the under pad or cushion of saddle; especially, a pad or cushion put on behind a man's saddle, on which a woman may ride. "His [a soldier's] shank pillion without stirrups." (Spenser) Origin: Ir. Pillin, pilliun (akin to Gael. Pillean, pillin), fr. Ir. & Gael. Pill, peall, a skin or hide, prob. Fr. L. Pellis. See Pell, Fell skin. Source: Websters Dictionary (01 Mar 1998) |
| pillow | 1. Anything used to support the head of a person when reposing; especially, a sack or case filled with feathers, down, hair, or other soft material. "[Resty sloth] finds the down pillow hard." (Shak) 2. <machinery> A piece of metal or wood, forming a support to equalize pressure; a brass; a pillow block. 3. A block under the inner end of a bowsprit. 4. A kind of plain, coarse fustian. Lace pillow, a cushion used in making hand-wrought lace. Pillow bier [OE. Pilwebere; cf. LG. Bure a pillowcase], a pillowcase; pillow slip. <machinery> Pillow block, a block, or standard, for supporting a journal, as of a shaft. It is usually bolted to the frame or foundation of a machine, and is often furnished with journal boxes, and a movable cover, or cap, for tightening the bearings by means of bolts; called also pillar block, or plumber block. Pillow lace, handmade lace wrought with bobbins upon a lace pillow. Pillow of a plow, a crosspiece of wood which serves to raise or lower the beam. Pillow sham, an ornamental covering laid over a pillow when not in use. Pillow slip, a pillowcase. Origin: OE. Pilwe, AS. Pyle, fr. L. Pilvinus. Source: Websters Dictionary (01 Mar 1998) |
| pillworm | <zoology> Any myriapod of the genus Iulus and allied genera which rolls up spirally; a galleyworm. Source: Websters Dictionary (01 Mar 1998) |
| pillwort | <botany> Any plant of the genus Pilularia; minute aquatic cryptograms, with small pill-shaped fruit; sometimes called peppergrass. Source: Websters Dictionary (01 Mar 1998) |
| pilo- | Hair. Origin: L. Pilus (05 Mar 2000) |
| pilobezoar | Synonym: trichobezoar. Origin: pilo-+ bezoar (05 Mar 2000) |
| pilocarpine | <chemistry> An alkaloid extracted from jaborandi (Pilocarpus pennatifolius) as a white amorphous or crystalline substance which has a peculiar effect on the vasomotor system. Origin: From NL. Pilocarpus pennatifolius jaborandi; L. Pilus hair + Gr. Fruit: cf. F. Pilocarpine. Source: Websters Dictionary (01 Mar 1998) |
| pilocarpine esterase | <enzyme> Hydrolyzes pilocarpine to pilocarpic acid, probably not the same as acetylcholinesterase or butyrylcholinesterase Registry number: EC 3.1.1.- (26 Jun 1999) |
| pilocarpus | A genus of trees and shrubs found in Central and South America and in the West Indies. Constitutes the botanical source for pilocarpine, an alkaloid which activates cholinergic muscarinic receptors. Pilocarpine is used in the treatment of glaucoma where it is instilled in the eye. Sudorific; miotic. Synonym: Jaborandi. (05 Mar 2000) |
| pilocystic | Denoting a dermoid cyst containing hair. Origin: pilo-+ G. Kystis, bladder (05 Mar 2000) |
| piloerection | <dermatology> Erection of the hair. (18 Nov 1997) |
| piloid | Hairlike; resembling hair. Origin: pilo-+ G. Eidos, resemblance (05 Mar 2000) |
| piloid astrocytoma | <tumour> A slowly growing astrocytoma composed histologically of elongated fibrous astrocytes; often located in the optic chiasm or hypothalamus. Synonym: piloid astrocytoma. (05 Mar 2000) |