1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Vasum  \Va"sum\,  n.  [L.,  a  vase.  See  {Vase}.]  (Zo["o]l.) 
  A  genus  including  several  species  of  large  marine  gastropods 
  having  massive  pyriform  shells,  with  conspicuous  folds  on  the 
  columella. 

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