Cricetus frumentarius

from The Collaborative International Dictionary of English v.0.48
Hamster \Ham"ster\ (-st[~e]r), n. [G. hamster.] (Zool.)
   A small European rodent ({Cricetus frumentarius}). It is
   remarkable for having a pouch on each side of the jaw, under
   the skin, and for its migrations. Hamsters are commonly kept
   as a pets.
   [1913 Webster +PJC]
    

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