单词	estriol
释义	estriol noun es·​tri·​ol ˈe-ˌstrī-ˌȯl  e-ˈstrī-, -ˌōl : a relatively weak natural estrogenic hormone that is a glycol C18H24O3 found in the body chiefly as a metabolite of estradiol, is the main estrogen secreted by the placenta during pregnancy, and is the estrogen typically found in the urine of pregnant women Word History Etymology estrane + tri- + -ol entry 1 First Known Use 1933, in the meaning defined above Medical Definition estriol noun es·​tri·​ol ˈes-ˌtrī-ˌȯl  e-ˈstrī-  -ˌōl variants or chiefly British oestriol ˈē-ˌstrī-ˌȯl  ē-ˈstrī-  -ˌōl : a relatively weak natural estrogenic hormone that is a glycol C18H24O3 found in the body chiefly as a metabolite of estradiol, is the main estrogen secreted by the placenta during pregnancy, and is the estrogen typically found in the urine of pregnant women
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