资料来源 : pyDict
软体动物类
资料来源 : Webster's Revised Unabridged Dictionary (1913)
Opisthobranchia \O*pis`tho*bran"chi*a\, Opisthobranchiata
\O*pis`tho*bran`chi*a"ta\, n. pl. [NL., from Gr. ? behind + ?
gills.] (Zo["o]l.)
A division of gastropod Mollusca, in which the breathing
organs are usually situated behind the heart. It includes the
tectibranchs and nudibranchs.
资料来源 : WordNet®
Opisthobranchia
n : gastropods having the gills when present posterior to the
heart and having no operculum: includes sea slugs; sea
butterflies; sea hares [syn: {subclass Opisthobranchia}]