ovolactovegetarian UK /ˌəʊ.vəʊˌlæk.təʊˌvɛ.d͡ʒɪˈtɛəɹi.ən/US /ˌoʊ.voʊˌlæk.toʊˌvɛ.d͡ʒɪˈtɛɹi.ən/ noun1 •A lacto-ovo-vegetarian. formsovolactovegetarians