gonopodium

gonopodium [gon-uh-poh-dee-uh m] Word Origin noun, plural gon·o·po·di·a [gon-uh-poh-dee-uh] /ˌgɒn əˈpoʊ di ə/. Ichthyology.

1. the modified anal fin of a male poeciliid fish, serving as an organ of copulation.

Origin of gonopodium gono- + -podium Related formsgon·o·po·di·al, adjective