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trichosis

American  
[trih-koh-sis] / trɪˈkoʊ sɪs /

noun

Pathology.
  1. any disease of the hair.


trichosis British  
/ trɪˈkəʊsɪs /

noun

  1. any abnormal condition or disease of the hair

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of trichosis

First recorded in 1685–95; trich- + -osis