geogenic,a.|dʒiːəʊˈdʒɛnɪk| [f. geogen-y + -ic.] Pertaining to geogeny; earth-forming or producing. 1854Mayne Expos.Lex., Geogenicus, geogenic.1882T. S. Hunt in Pop.Sci. Monthly XXII. 170 They are the geogenic agencies which have molded the mineral mass of the earth.