立体异构 lìtǐyìgòu stereoisomerism Origin Definitions Defs Strokes Stroke Words Sentences Sents 立体 立體 lìtǐ three-dimensional three-dimensional; stereoscopic; describing an object that has length, width, and depth异构 異構 yìgòu isomerism, isomeric (chemistry) existence of chemical compounds that have the same molecular formula but different arrangements of atoms