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Pityrosporum

(pĭt′ĭ-rŏspər-əm, pĭt′ĭ-rō-spôrəm)
n.
  1. A genus of fungi that includes one species that can cause tinea versicolor and another that is found primarily on the face and scalp and appears in dandruff and seborrheic dermatitis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.