oogamous Syllabification: (o·og·a·mous)Pronunciation: /ōˈägəməs/Definition of oogamous adjective Biology relating to or denoting reproduction by the union of mobile male and immobile female gametes. Derivatives oogamously adverb oogamyPronunciation: /-gəmē/ noun oogamous in other Oxford dictionaries Definition of oogamous in the British & World English dictionary