Megastome

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Megastome \Meg"a*stome\, n. [Gr. me`gas great + sto`ma mouth.]
     (Zool.)
     One of a group of univalve shells, having a large aperture or
     mouth.
     [1913 Webster] Megathere