pilus
[pi´lus] (L.) 1. hair. adj.,
adj pi´lial.
2. one of the minute filamentous appendages of certain bacteria associated with antigenic properties and sex functions of the cell. Called also
fimbria. adj.,
adj pi´liate.
F pilus in bacterial genetics, a hollow tubular pilus possessed by (male) F
+ cells, the carrier of the
F plasmid (fertility plasmid). It forms a connection with a (female) F
− cell in bacterial
conjugation to allow the transfer of genetic material.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
pi·'li tor·'ti
[MIM*261900] a condition in which many hair shafts are twisted on the long axis, congenital or acquired as a result of distortion of the follicles from a scarring inflammatory process, mechanical stress, or cicatrizing alopecia; the hair shafts resemble spangles in reflected light, are brittle, and break at varying lengths with many areas appearing bald with a dark stubble; as a developmental defect it can be manifested in such syndromes as Bjornstad, Crandall, and Menkes.
Farlex Partner Medical Dictionary © Farlex 2012
pili torti
A hair shaft defect, seen in ash-blondes, where hair is grooved and flattened at varying intervals and twisted on its axis; the defect is usually recognized by age 2-3, the hair having a 'spangled' appearance; it is either an AR condition.a sui generis or part of the X-R Menke's kinky hair syndrome, associated with mental retardation. Cf Ringed hair, Wooly hair. McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
pi·li tor·ti
(pī'lī tōr'tī) A condition in which many hair shafts are twisted on the long axis; congenital, or acquired as a result of distortion of the follicles from a scarring inflammatory process, mechanical stress, or cicatrizing alopecia; the hair shafts resemble spangles in reflected light, are brittle, and break at varying lengths, with many areas appearing bald with a dark stubble; as a developmental defect, it can be manifested in Björnstad, Crandall, and Menkes syndromes.
Synonym(s):
twisted hairs.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012