The Collaborative International Dictionary
Proctodaeum
Proctodaeum \Proc`to*d[ae]"um\, n. [NL., fr. Gr. ? the anus + ? to divide.] (Anat.) See Mesenteron.
Wiktionary
proctodaeum
n. (alternative spelling of proctodeum English)
proctodæum
n. (alternative form of proctodeum English)