Webster’s Revised Unabridged Dictionary · 1913
Tectibranchiate
Tec′ti·bran′chi·ate (tĕk′tĭ·brăn̲′kĭ·āt), a. [L. tectus (p. p. of tegere to cover) + E. branchiate.] (Zoöl.) Having the gills covered by the mantle; of or pertaining to the Tectibranchiata. — n. A tectibranchiate mollusk.