ark shell

2 definitions found

ark shell - Collaborative International Dictionary of English v.0.48 :

  Ark shell \Ark" shell`\ (Zool.)
     A marine bivalve shell belonging to the genus Arca and its
     allies.
     [1913 Webster]

ark shell - WordNet (r) 2.1 (2005) :

  ark shell
      n 1: marine bivalve mollusk having a heavy toothed shell with a
           deep boat-like inner surface