any marine mollusc of the class Scaphopoda, which includes the tusk (or tooth) shells
Word origin
C20: from New Latin, from Greek skaphē boat + -pod
scaphopod in American English
(ˈskæfəˌpɑd)
noun
any of a class (Scaphopoda) of mollusks that live in muddy or sandy sea bottoms and have slightly curved, tubular shells open at both ends with a long, pointed, protrusile foot at the larger end