a·bi·o·gen·e·sis (ā'bī-ō-jěn'ĭ-sĭs) n. The supposed development of living organisms from nonliving matter. Also called autogenesis, spontaneous generation. a'bi·o·ge·net'ic (-jə-nět'ĭk), a'bi·o·ge·net'i·cal adj., a'bi·o·ge·net'i·cal·ly adv., a'bi·og'e·nist (-ŏj'ə-nĭst) n.