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pthirus in Medicine

Pthirus

(thĭrəs, thīrəs)
n.
  1. A genus of parasitic lice of the family Pediculidae, formerly grouped in the genus Pediculus, the main species of which is the crab louse.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.