genetics Syllabification: (ge·net·ics)Pronunciation: /jəˈnetiks/Translate genetics | into French | into German | into Italian | into Spanish Definition of genetics noun [treated as singular] the study of heredity and the variation of inherited characteristics. [treated as singular or plural] the genetic properties or features of an organism, characteristic, etc.:the effects of family genetics on the choice of careerDerivatives geneticistPronunciation: /-ˈnetəsist/ noun genetics in other Oxford dictionaries Definition of genetics in the British & World English dictionary