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Medical Definition of I pili
1. See: pilus. Pili multigemini, the presence of several hairs in a single follicle. R pili, specialised pili found on bacterial cells, similar to F pili and associated with R plasmids. Pili torti, 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's, Crandall's, and Menkes'. Synonym: twisted hairs. (05 Mar 2000)
Lexicographical Neighbors of I Pili
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