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Meaning of antimere

an•ti•mere

Pronunciation: (an'tu-mēr"), [key]
— n. Zool.
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.