estrone

American  

[es-trohn] / ˈɛs troʊn /

noun

1. Biochemistry.  an estrogenic hormone, C 18 H 22 O 2 , produced by the ovarian follicles and found during pregnancy in urine and placental tissue.

2. Pharmacology.  a commercial form of this compound, obtained from the urine of pregnant women or synthesized from ergosterol, used in the treatment of estrogen deficiency and certain menopausal and postmenopausal conditions.

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estrone British  

/ ˈiːstrəʊn, ˈɛstrəʊn /

noun

1. the usual US spelling of oestrone

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Etymology

Origin of estrone

First recorded in 1930–35; estr(in) + -one

Example Sentences

"With weight loss, production of estrone decreases, so circulating estradiol is more effective," Taylor said, and this is why overweight women may have more severe symptoms than women who are thinner.

From US News

As women age, the key hormones their bodies naturally produce — estrogen, which is a group of hormones that includes estriol, estradiol and estrone, as well as progesterone and testosterone — may fluctuate or decline.

From Washington Post