polyphagousPronunciation: /pəˈlɪfəgəs/Definition of polyphagous adjective Zoology (of an animal) able to feed on various kinds of food: many of those that use alien plants are polyphagousOrigin: early 19th century: from Greek poluphagos 'eating to excess' + -ouspolyphagous in other Oxford dictionaries Definition of polyphagous in the US English dictionary