zymosterol

noun
zy·​mos·​ter·​ol | \ zī-ˈmäs-tə-ˌrȯl How to pronounce zymosterol (audio) , -ˌrōl How to pronounce zymosterol (audio) \

Medical Definition of zymosterol

: a crystalline unsaturated sterol C27H43OH occurring with ergosterol in yeast fat, resembling ergosterol chemically, and yielding cholestanol on hydrogenation