potoo Syllabification: (po·too)Pronunciation: /pəˈto͞o/Definition of potoo noun a nocturnal, insectivorous bird resembling a large nightjar. Found in tropical America, it mimics a dead branch when alarmed. Genus Nyctibius and family Nyctibiidae: five species, in particular the common potoo (N. griseus) Origin: mid 19th century: from Jamaican Creole, from Twi, of imitative originpotoo in other Oxford dictionaries Definition of potoo in the British & World English dictionary