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polyonychia in Medicine

polyonychia

(pŏl′ē-ō-nĭkē-ə)
n.
  1. The presence of supernumerary nails on the fingers or toes.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.