/ Dictionary / Index S stereoisomer: Meaning and Definition of Find definitions for: ster•e•o•i•so•mer Pronunciation: (ster"ē-ō-ī'su-mur, stēr"-), [key] — n. Chem. any of two or more isomers exhibiting stereoisomerism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stereoimage stereoisomeric Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language