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English word enantiomer comes from English -mer, English enantio- (Opposite, opposed, opposing.)
-mer (English)
(chemistry) Used to form words relating to chemical structure, denoting parts of a molecule, for example, monomer (one part), dimer (two parts), polymer (many parts).
enantio- (English)
Opposite, opposed, opposing.
enantiomer (English)
(chemistry) One of a pair of stereoisomers that is the mirror image of the other, but may not be superimposed on this other stereoisomer. Almost always, a pair of enantiomers contain at least one chiral center, and a sample of either enantiomer will be optically active.