Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “oestrogen”


noun [U] uk UK (US estrogen)   /ˈiː.strə.dʒən/ us    /ˈes.trə-/
a female hormone that causes development and change in the reproductive organs (= organs involved in producing babies)Animal biochemistryAnimal reproduction
(Definition of oestrogen from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of oestrogen?
Add Cambridge dictionaries to your browser to your website

Definitions of “oestrogen” in other dictionaries

Word of the Day


a small company that makes beer, usually using traditional methods, and often has a restaurant where its beer is served

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More