Main Entry: di·eth·yl·stil·bes·trol

Pronunciation: \-stil-ˈbes-ˌtrȯl, -ˌtrōl\

Variant(s): or chiefly British di·eth·yl·stil·boes·trol \-ˈbēs-\

Function: noun

: a colorless crystalline synthetic compound C₁₈H₂₀O₂ used as a potent estrogen but contraindicated in pregnancy for its tendency to cause cancer or birth defects in offspring—called also DES, stilbestrol