
Vasum, common name the vase snails or vase shells, is a genus of mostly rather large predatory sea snails, marine gastropod mollusks within the family Turbinellidae. ==Shell description== Shells of species in this genus are usually somewhat large, and are usually very thick and heavy. They are often vase-shaped, in the sense that the shell of most...
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http://en.wikipedia.org/wiki/Vasum

• (n.) A genus including several species of large marine gastropods having massive pyriform shells, with conspicuous folds on the columella.
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http://thinkexist.com/dictionary/meaning/vasum/
Va'sum noun [ Latin , a vase. See
Vase .]
(Zoology) A genus including several species of large marine gastropods having massive pyriform shells, with conspicuous folds on the columella.
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http://www.encyclo.co.uk/webster/V/9
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