stigˈmastəˌrȯl, -rōl noun
( -s )
Etymology: International Scientific Vocabulary stigma- (from New Latin Physostigma ) + sterol — more at physostigma
: a crystalline steroid alcohol C 29 H 47 OH obtained especially from the oil of Calabar beans and from soybean oil usually in mixtures with sitosterols and used in the synthesis of progesterone