/duy'euh ster"ee euh meuhr, -stear"-/ , n. Chem.
either of a pair of stereoisomers that are not mirror images of each other. Also called diastereoisomer /duy'euh ster'ee oh uy"seuh meuhr, -stear'-/ . Cf. enantiomer .
[ 1935-40; DIA- + STEREO(ISO)MER ]