Asiphonea
Pronunciation : As`i*pho"ne*a
Part of Speech : A*si`pho*na"ta
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: A group of bivalve mollusks destitute of siphons, as the oyster; the asiphonate mollusks.
Source : Webster's Unabridged Dictionary, 1913