| pterylography | <ornithology> The study or description of the arrangement of feathers, or of the pterylae, of birds. (06 Mar 1998) |
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| pterylosis | <zoology> The arrangement of feathers in definite areas. Origin: NL, fr. NL. & E. Pteryla. Source: Websters Dictionary (01 Mar 1998) |
| PTF | <abbreviation> Plasma thromboplastin factor. (05 Mar 2000) |
| PTH | <abbreviation> Parathyroid hormone; phenylthiohydantoin. (05 Mar 2000) |
| PTHC | <abbreviation> Percutaneous transhepatic cholangiography. (05 Mar 2000) |
| pthiriasis | Synonym: pediculosis pubis. Origin: G. Phtheiriasis, fr. Phtheir, a louse (05 Mar 2000) |
| pthiriasis capitis | The presence of lice on the scalp, seen especially in children, with nits attached to hairs. Synonym: pthiriasis capitis. (05 Mar 2000) |
| pthiriasis corporis | The presence of body lice which live in the seams of clothing. Biting causes pruritus and excoriations. See: parasitic melanoderma. Synonym: pediculosis vestimenti, pediculosis vestimentorum, pthiriasis corporis. (05 Mar 2000) |
| pthiriasis pubis | Presence of crab lice in the pubis and other hairy areas of the trunk, and in the eyelashes of infants and young children. (05 Mar 2000) |
| Pthirus | A genus of lice (family Pediculidae) formerly grouped in the genus Pediculus. The main species is Pthirus pubis (Pediculus pubis), the crab or pubic louse, a parasite that infests the pubis and neighboring hairy parts of the body. Often incorrectly spelled Phthirus or Phthirius. Origin: irreg. Fr. G. Phtheir, louse (05 Mar 2000) |
| Pti1 kinase | <enzyme> Pti1 - pto-interacting 1; pti1 is phosphorylated by pto and is involved in the hypersensitive response in tomato; genbank u28007 Registry number: EC 2.7.10.- Synonym: pti1 gene product (26 Jun 1999) |
| ptilocerque | <zoology> The pentail. Origin: Gr. A feather + tail. Source: Websters Dictionary (01 Mar 1998) |
| ptilopaedes | <zoology> Same as Dasypaedes. Origin: NL, fr. Gr. A feather +, offspring. Source: Websters Dictionary (01 Mar 1998) |
| ptilopaedic | <ornithology, zoology> Having nearly the whole surface of the skin covered with down; dasypaedic; said of the young of certain birds. Source: Websters Dictionary (01 Mar 1998) |
| ptilopteri | <ornithology> An order of birds including only the penguins. Origin: NL, fr. Gr. A downy feather + wing. Source: Websters Dictionary (01 Mar 1998) |