Main Entry: es·trone

Pronunciation: \ˈes-ˌtrōn\

Variant(s): or chiefly British oes·trone \ˈē-ˌstrōn\

Function: noun

: a natural estrogenic hormone that is a ketone C₁₈H₂₂O₂ found in the body chiefly as a metabolite of estradiol, is also secreted especially by the ovaries, and is used to treat various conditions (as ovarian failure and menopausal symptoms) relating to estrogen deficiency—see theelin