oestrone

US estrone

/ (ˈiːstrəʊn, ˈɛstrəʊn) /

noun

a weak oestrogenic hormone secreted by the mammalian ovary and having the same medical uses as oestradiol. Formula: C 18 H 22 O 2

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Word Origin for oestrone

C20: from oestr (us) + -one
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