variants
or British oestrogen
ˈɛstrəʤən 
British ˈiːstrəʤən
medical
: a substance (called a hormone) that occurs naturally in women
Note: Estrogen plays an important role in the development of the female characteristics of a woman's body.
Cite this Entry
“Estrogen.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/estrogen. Accessed 22 Jun. 2026.
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