Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
otidium — dēəm noun (plural otidia) Etymology: New Latin, from ot + idium : the otocyst of a mollusk * * * ‖ oˈtidium [mod.L., f. Greek type *ὠτίδιον, dim. of οὖς, ὠτός ear; cf. ommati … Useful english dictionary
otidium — otid·i·um … English syllables