allogenicPronunciation: /ˌaləˈdʒɛnɪk/Definition of allogenic adjective 1 Geology (of a mineral or sediment) transported to its present position from elsewhere. Often contrasted with authigenic. 2 Ecology (of a successional change) caused by non-living factors in the environment. allogenic in other Oxford dictionaries Definition of allogenic in the US English dictionary