'Tectibranchiata' definitions:

Definition of 'Tectibranchiata'

From: GCIDE

Tectibranchiata \Tec`ti*bran`chi*a"ta\, n. pl. [NL., fr. L. tectus (p. p. of tegere to cover) + Gr. ? a gill.] (Zool.) An order, or suborder, of gastropod Mollusca in which the gills are usually situated on one side of the back, and protected by a fold of the mantle. When there is a shell, it is usually thin and delicate and often rudimentary. The aplysias and the bubble shells are examples. [1913 Webster]