The Collaborative International Dictionary
Osphradia
Osphradium \Os*phra"di*um\, n.; pl. Osphradia. [NL., fr. Gr. ? strong scent, fr. ? to smell.] (Zo["o]l.) The olfactory organ of some Mollusca. It is connected with the organ of respiration.
Wiktionary
osphradia
n. (plural of osphradium English)