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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.


estrone British  
/ ˈiːstrəʊn, ˈɛstrəʊn /

noun

  1. the usual US spelling of oestrone

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of estrone

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The primary hormones produced by the ovaries are estrogens, which include estradiol, estriol, and estrone.

From Textbooks • Jun. 19, 2013

They noted if products like hair oil, hair lotion, leave-in conditioners, and relaxers/perms had label ingredients such as hormones, placenta, estrogen, estradiol, estriol, estrone, methylparaben, butyl-paraben, and proplyparaben.

From Scientific American • Mar. 2, 2012

The fluid containing estrone rises to the top.

From Time Magazine Archive

Some lucky women, regardless of weight, simply churn out more estrone once estrogen from the ovaries shuts off.

From Time Magazine Archive

It is based on the long-known fact that the amount of the female hormone, estrone, in the urine increases greatly after conception.

From Time Magazine Archive