noun Zoology.
  1. a segment or division of the body having a corresponding segment or division that is opposite to it relative to the longitudinal axis of the body.
  2. a similar part in a radially symmetrical animal.

Origin of antimere

First recorded in 1875–80; anti- + -mere
Related formsan·ti·mer·ic [an-tuh-mer-ik] /ˌæn təˈmɛr ɪk/, adjectivean·tim·er·ism [an-tim-uh-riz-uh m] /ænˈtɪm əˌrɪz əm/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for antimere


  1. a part or organ of a bilaterally or radially symmetrical organism that corresponds to a similar structure on the other side of the axis, such as the right or left limb of a four-legged animalAlso called: actinomere
Derived Formsantimeric (ˌæntɪˈmɛrɪk), adjectiveantimerism (ænˈtɪməˌrɪzəm), noun
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

antimere in Medicine


  1. A segment of an animal body formed by planes cutting the axis of the body at right angles.
  2. One of the corresponding parts of a bilaterally symmetrical organism.
  3. The right or left half of the body.
Related formsan′ti•meric (-mĕrĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.