[ at-uh-viz-uh m ]
/ ˈæt əˌvɪz əm /
- the reappearance in an individual of characteristics of some remote ancestor that have been absent in intervening generations.
- an individual embodying such a reversion.
reversion to an earlier type; throwback.
Origin of atavism
1825–35; < Latin atav(us) remote ancestor (at-, akin to atta familiar name for a grandfather + avus grandfather, forefather) + -ism
Related formsat·a·vist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for atavists
/ (ˈætəˌvɪzəm) /
the recurrence in a plant or animal of certain primitive characteristics that were present in an ancestor but have not occurred in intermediate generations
reversion to a former or more primitive type
Derived Formsatavist, nounatavic (əˈtævɪk), adjective
Word Origin for atavism
C19: from French atavisme, from Latin atavus strictly: great-grandfather's grandfather, probably from atta daddy + avus grandfather
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for atavists
[ ăt′ə-vĭz′əm ]
The appearance of characteristics that are presumed to have been present in some remote ancestor; reversion to an earlier biological type.
Related formsat′a•vist n.at′a•vis′tic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.