Pygobranchia
Pronunciation : Py`go*bran"chi*a
Part of Speech : n.
Etymology : [NL., fr. Gr. pugh` the rump + (Zo?l.)
Definition : Defn: A division of opisthobranchiate mollusks having the branchi? in a wreath or group around the anal opening, as in the genus Doris.
pl.
Source : Webster's Unabridged Dictionary, 1913