noun
Chemistry term for one of a pair of molecules that are mirror images of each other but not superimposable.
この化合物のエナンチオマーは光学活性を示す。
The enantiomer of this compound shows optical activity.
Diastereomers are stereoisomers that are not mirror images, unlike enantiomers.
A racemic mixture contains equal amounts of both enantiomers and is optically inactive.
Borrowed from English 'enantiomer', which derives from Greek 'enantios' (opposite) and 'meros' (part).