The Collaborative International Dictionary
Tectibranchiate
Tectibranchiate \Tec`ti*bran"chi*ate\, a. [L. tectus (p. p. of tegere to cover) + E. branchiate.] (Zo["o]l.) Having the gills covered by the mantle; of or pertaining to the Tectibranchiata. -- n. A tectibranchiate mollusk.
Wiktionary
tectibranchiate
a. (context zoology English) Having the gills covered by the mantle; of or relating to the Tectibranchiata. n. Any tectibranchiate mollusk.