capable of part of copulation male reproductive organ intromittent organ HAO:0000091 AAO:0010255 TAO:0002036 copulatory organ An external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most often in terrestrial species, as most aquatic species fertilize their eggs externally, although there are exceptions[WP]. penis TGMA:0000585 UBERON:0008811 Wikipedia:Intromittent_organ