am·phig·e·nous \(ˈ)am|fijənəs\adjective Etymology:amphi- + -genous 1. a.of the fruiting bodies of parasitic fungi: occurring on both surfaces of the leaves of an infected plant b.of the oogonium of fungi of the family Pythiaceae: growing through an encircling antheridium 2.: given to or marked by sexual attraction to members either of the same or of the opposite sex • amphig·e·nous·lyadverb