stereoisomerism

stereoisomerism englanniksi

1. (''chemistry'') A form of isomerism in which atoms are arranged differently about a chiral centre (or centre of asymmetry). They exhibit activity, and in a molecule with a single chiral centre the two isomers (enantiomers) are images of each other whereas in a molecule with multiple chiral centres the isomers (diastereoisomers) are not normally mirror images.