n.
Pronunciation: ˌ es-tr ə - ' d ī - ˌ o ̇ l, - ˌ ō l
Function: noun
Etymology: International Scientific Vocabulary estra- (fr. estrane parent compound of estradiol, from New Latin estrus + English -ane ) + di- + 1 -ol
Date: 1934
: a natural estrogenic hormone that is a phenolic alcohol C 18 H 24 O 2 secreted chiefly by the ovaries, that is the most potent of the naturally occurring estrogens, and that is administered in its natural or semisynthetic esterified form especially to treat menopausal symptoms