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Definition of progesterone noun from the Oxford Advanced American Dictionary

 

progesterone

 noun
noun
NAmE//prəˈdʒɛstəˌroʊn//
 
[uncountable]
 
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a hormone produced in the bodies of women and female animals that prepares the body to become pregnant and is also used in contraception compare estrogen, testosterone
See the Oxford Advanced Learner's Dictionary entry: progesterone