noun
also diethyl·stilboestrol (|) ̷ ̷| ̷ ̷ ̷ ̷+
Etymology: International Scientific Vocabulary diethyl- + stilbestrol, stilboestrol
: a colorless crystalline diphenol [HOC 6 H 4 C(C 2 H 5 ) = ] 2 derived from stilbene and used as a potent estrogen in medicine and in livestock and poultry feed — called also stilbestrol