FETUS Meaning of FETUS in English fe ‧ tus /ˈfiːtəs/ BrE AmE noun [countable] [ Date: 1300-1400 ; Language: Latin ; Origin: 'giving birth, things born' ] the usual American spelling of ↑ foetus Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012