Noun
stereoisomer (plural stereoisomers)
(chemistry) one of a set of the isomers of a compound that exhibits stereoisomerism
The structure of such a molecule is such that it is not identical to its mirror image (which would be that of a different stereoisomer, or the "opposite enantiomer"). Source: Internet
More definitions * A configurational stereoisomer is a stereoisomer of a reference molecule that has the opposite configuration at a stereocenter (e. Source: Internet
The active stereoisomer is (−)-paclitaxel (shown here). Source: Internet
The rotation of the plane of polarization may be either clockwise, to the right ( dextrorotary — d-rotary), or left ( levorotary — l-rotary) depending on which stereoisomer is present (or dominant). Source: Internet