‖n. pl. [ NL., from Gr. ska`fh a boat + -poda. ] (Zool.) A class of marine cephalate Mollusca having a tubular shell open at both ends, a pointed or spadelike foot for burrowing, and many long, slender, prehensile oral tentacles. It includes Dentalium, or the tooth shells, and other similar shells. Called also Prosopocephala, and Solenoconcha. [ 1913 Webster ]