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Definition of estrogen noun from the Oxford Advanced Learner's Dictionary

 

estrogen

 
(North American English)
 
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(British English oestrogen)
BrE BrE//ˈiːstrədʒən//
 
; NAmE NAmE//ˈestrədʒən//
 
noun [uncountable] a hormone produced in women’s ovaries that causes them to develop the physical and sexual features that are characteristic of females and that causes them to prepare their body to have babies compare progesterone, testosterone
See the Oxford Advanced American Dictionary entry: estrogen

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