| pileworm | <zoology> The teredo. Source: Websters Dictionary (01 Mar 1998) |
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| pilewort | <botany> A plant (Ranunculus Ficaria of Linnaeus) whose tuberous roots have been used in poultices as a specific for the piles. Source: Websters Dictionary (01 Mar 1998) |
| pilgarlic | One who has lost his hair by disease; a sneaking fellow, or one who is hardly used. Origin: Etymol. Uncertain. Source: Websters Dictionary (01 Mar 1998) |
| pili | Thread-like structures present on some bacteria. Pili are shorter thanflagella and are used to adhere bacteria to oneanother during mating and to adhere to animal cells. (09 Oct 1997) |
| pili annulati | A rare condition in which the hair shows alternate pigmented and bright segments, the latter due to air cavities within the cortex. Synonym: leukotrichia annularis, pili annulati, thrix annulata, trichonosus versicolor. (05 Mar 2000) |
| pili, sex | Filamentous or elongated proteinaceous structures which extend from the cell surface in gram-negative bacteria that contain certain types of conjugative plasmid. These pili are the organs associated with genetic transfer and have essential roles in conjugation. Normally, only one or a few pili occur on a given donor cell. this preferred use of "pili" refers to the sexual appendage, to be distinguished from bacterial fimbriae (fimbriae, bacterial), also known as common pili, which are usually concerned with adhesion. (12 Dec 1998) |
| pilidium | Origin: NL, fr. Gr, dim. Of a cap. <zoology> The free-swimming, hat-shaped larva of certain nemertean worms. It has no resemblance to its parent, and the young worm develops in its interior. Source: Websters Dictionary (01 Mar 1998) |
| pilifera | <zoology> Same as Mammalia. Origin: NL. See Piliferous. Source: Websters Dictionary (01 Mar 1998) |
| piliferous cyst | A dermoid cyst containing hair. (05 Mar 2000) |
| piliform | <botany> Resembling hairs or down. Origin: L. Pilus hair. Source: Websters Dictionary (01 Mar 1998) |
| pilimiction | Passage of hairs in the urine, as in cases of dermoid tumours, or of threads of mucus in the urine. Origin: L. Pilus, hair, + mictio, urination (05 Mar 2000) |
| pilin | 1. General term for the protein subunit of pilus. 2. Protein subunit (7.2 kD) of f pili, sex pili coded for by the F plasmid. (18 Nov 1997) |
| piling unmerchantable material | (PUM) A logging contract requirement to remove and pile unmerchantable woody material of a specified size. (05 Dec 1998) |
| pill | The peel or skin. "Some be covered over with crusts, or hard pills, as the locusts." Origin: Cf. Peel skin, or Pillion. 1. To deprive of hair; to make bald. 2. To peel; to make by removing the skin. "[Jacob] pilled white streaks . . . In the rods." (Gen. Xxx. 37) Origin: Cf. L. Pilare to deprive of hair, and E. Pill, n. (above). 1. A medicine in the form of a little ball, or small round mass, to be swallowed whole. 2. Figuratively, something offensive or nauseous which must be accepted or endured. <zoology> Pill beetle, any terrestrial isopod of the genus Armadillo, having the habit of rolling itself into a ball when disturbed. Synonym: pill wood louse. Origin: F. Pilute, L. Pilula a pill, little ball, dim. Of L. Pila a ball. Cf. Piles. Source: Websters Dictionary (01 Mar 1998) |
| pill mass | The mixture of drug(s), excipients, diluents and binders with a suitable amount of liquid to form a plastic mass which can be rolled into a long rod and cut into the appropriate number of units for pills to be rolled from. Synonym: pill mass. (05 Mar 2000) |