hypothetico-deductive Syllabification: (hy·po·thet·i·co-de·duc·tive)Pronunciation: /ˌhīpəˌTHetikō diˈdəktiv/Definition of hypothetico-deductive adjective Philosophy of or relating to the testing of the consequences of hypotheses, to determine whether the hypotheses themselves are false or acceptable. hypothetico-deductive in other Oxford dictionaries Definition of hypothetico-deductive in the British & World English dictionary