estriol

noun
es·tri·ol | \ˈe-ˌstrī-ˌȯl, e-ˈstrī-, -ˌōl\

Definition of estriol 

: 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

First Known Use of estriol

1933, in the meaning defined above

History and Etymology for estriol

estrane + tri- + -ol entry 1

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The first known use of estriol was in 1933

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estriol

noun
es·tri·ol | \ˈes-ˌtrī-ˌȯl, e-ˈstrī-, -ˌōl\
variants: or chiefly British oestriol \ˈē-ˌstrī-ˌȯl, ē-ˈstrī-, -ˌōl \

Medical Definition of estriol 

: 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

More from Merriam-Webster on estriol

Britannica.com: Encyclopedia article about estriol

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