The story
From phallo- + a latinized and nominalized form of Ancient Greek ὁδαῖος (hodaîos, “on the way”), modelled after proctodeum and stomodeum.
Etymology from Wiktionary, CC BY-SA 4.0.
phallodeum
Today it means: A penis-like organ in male caecilians, which is inserted into the cloaca of the female for several hours. Full definition →