| antimer | <chemistry> A pair of chiral isomers (stereoisomers) that are direct, nonsuperimposable mirror images of each other. (09 Jan 1998) |
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| antimere | 1. A segment of an animal body formed by planes cutting the axis of the body at right angles. 2. One of the symmetrical parts of a bilateral organism. 3. The right or left half of the body. Origin: anti-+ G. Meros, a part (05 Mar 2000) |