noun
also oes·tri·ol ˈeˌstrīˌȯl, eˈs-, -īˌōl
( -s )
Etymology: blend of estrin, oestrin and -triol
: a white crystalline estrogenic hormone that is a phenolic steroid glycol C 18 H 24 O 3 and is usually obtained from the urine of pregnant women — called also theelol