adenodactyl
From ZooTerms (Dictionary of Invertebrate Zoology)
adenodactyl (noun; plural adenodactyli, adenodactyls; Greek aden, gland; daktylos, finger): (Platyhelminthes: Turbellaria) Prostatoid male apparatus occurring in the wall of the common antrum in some freshwater and land triclads and some Acoela, thought to act as stimulators in copulation.
