tinea versicolor

[vûr′sĭ-kŭlər]
n.
  1. An eruption of tan or brown, branny patches on the skin of the trunk, caused by the fungus Pityrosporum furfur and often appearing white in contrast with hyperpigmented skin after exposure to intense sunlight.pityriasis versicolor
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.