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Either of a pair of molecules that are mirror images but cannot be superimposed on each other, and that rotate the plane of polarized light by an equal amount in opposite directions. Also called enantiomorph, optical isomer.

[Greek enantios, opposite; see ant- in Indo-European roots + -mer, isomer.]

en·an′ti·o·mer′ic (-mĕr′ĭk) adj.


(Chemistry) chem a molecule that exhibits stereoisomerism because of the presence of one or more chiral centres


(ɪˈnæn ti ə mər)

either of a pair of optical isomers that are mirror images of each other.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.enantiomer - either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
References in periodicals archive ?
The differences between different grades of PLA are partly due to different ratios of lactic acid stereoisomers (D-, L-) where an amount of more than 93% of L-enantiomer results in a semicrystal-line polymer while it is amorphous when the content of L-lactic acid is between 50 and 93% (3).
In particular, these latter properties, specific of l-enantiomer, are attributed to direct stimulation of endothelial-dependent NO release with a consequent increase of NO bioavailability (17).