Dictionary entry

Pygobranchia

Webster's Dictionary 1913

‖Py′go‐bran″chi‐a (?), n. pl. [NL., fr. Gr. πuγή the rump + � a gill.] (Zoöl.) A division of opisthobranchiate mollusks having the branchiæ in a wreath or group around the anal opening, as in the genus Doris.