noun[mass noun] Biochemistry
An oestrogen similar to but less potent than oestradiol.
- Natural estrogen can also easily be divided into the three types of estrogen: estradiol, estrone, and estriol.
- There were increases in blood levels of the estrogens, estradiol and estrone, and a reduction of the protective HDL cholesterol.
- There was the hormone estrone, a form of the estrogen prescribed to help menopausal women.
1930s: from oestrane (parent molecule of most oestrogens) + -one.
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