extrauterine Syllabification: (ex·tra·u·ter·ine)Pronunciation: /ˌekstrəˈyo͞otərin, -rīn/Definition of extrauterine adjective Medicine existing, formed, or occurring outside the uterus:the first hour of extrauterine lifeextrauterine in other Oxford dictionaries Definition of extrauterine in the British & World English dictionary