polygenicPronunciation: /ˌpɒlɪˈdʒɛnɪk/Definition of polygenic adjective Genetics relating to or determined by polygenes: the theory of polygenic inheritanceDerivatives polygenically adverb Origin: 1940s: from Greek polugenēs 'of many kinds' + -icpolygenic in other Oxford dictionaries Definition of polygenic in the US English dictionary