atavism

Medical Dictionary

atavism at·a·vism (āt'ə-vĭz'əm)
n.
The appearance of characteristics that are presumed to have been present in some remote ancestor; reversion to an earlier biological type.


at'a·vist n.
at'a·vis'tic adj.
at'a·vis'ti·cal·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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