histogenesis Syllabification: (his·to·gen·e·sis)Pronunciation: /ˌhistəˈjenəsis/Definition of histogenesis noun Biology the differentiation of cells into specialized tissues and organs during growth. Derivatives histogeneticPronunciation: /ˌhistəjəˈnetik/ adjective histogenesis in other Oxford dictionaries Definition of histogenesis in the British & World English dictionary