proctodeum/ˌpɹɒktəˈdiːəm/EtymologyFrom Ancient Greek πρωκτός (prōktós, “rectum”) + a latinized and nominalized form of Ancient Greek ὁδαῖος (hodaîos, “on the way”). Compare stomodeum, urodeum, coprodeum, and phallodeum.proctodeum means the back ectodermal part of an alimentary canal. Lexicurio rates it Sui generis — a strength score of 88 out of 100.proctodeum is pronounced /ˌpɹɒktəˈdiːəm/.nounThe back ectodermal part of an alimentary canal.“The proctodeum is slightly larger than the urodeum in most species. It is separated from the urodeum by the uroproctodeal fold.”