Biol. [f. Gr. ἀντί opposite + μέρος part.] Usually pl. antimeres or in L. form antimera: Opposite divisions or halves.
1877. Huxley, Anat. Inv. Anim., ix. 545. The metamorphosis of the mesoderm into radially disposed antimeres.
1879. trans. Haeckel’s Evol. Man., I. 257. The whole body separates into two similar and symmetrical parts, the right and left halves … called counterparts, or antimera.
