sociobiology Syllabification: (so·ci·o·bi·ol·o·gy)Pronunciation: /ˌsōsēōˌbīˈäləjē/Definition of sociobiology noun the scientific study of the biological (especially ecological and evolutionary) aspects of social behavior in animals and humans. Derivatives sociobiologicalPronunciation: /-ˌbīəˈläjikəl/ adjective sociobiologicallyPronunciation: /-ˌbīəˈläjik(ə)lē/ adverb sociobiologistPronunciation: /-jist/ noun sociobiology in other Oxford dictionaries Definition of sociobiology in the British & World English dictionary