opisthobranchia

O*pis`tho*bran"chi*a, O*pis`tho*bran`chi*a"ta, n. pl. Etym: [NL., from Gr. (Zoöl.) Defn: A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs.

opisthobranchia - Similar Words

opisthobranchiate opisthobranchiata lophobranchiate pterobranchia lophobranchii anthobranchia lophobranch trichobranchia pseudobranchia phyllobranchia