Source : Webster's Revised Unabridged Dictionary (1913)

Hamster \Ham"ster\, n. [G. hamster.] (Zo["o]l.)
   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.

Source : WordNet®

hamster
     n : short-tailed Old World burrowing rodent with large cheek
         pouches

Source : Free On-Line Dictionary of Computing

hamster
     
        1.  (From {Fairchild}) A particularly slick
        little piece of code that does one thing well; a small,
        self-contained hack.  The image is of a hamster {happily}
        spinning its exercise wheel.
     
        2.  A tailless mouse; that is, one with an infrared
        link to a receiver on the machine, as opposed to the
        conventional cable.
     
        3.  (UK) Any item of hardware made by {Amstrad}, a
        company famous for its cheap plastic PC-almost-compatibles.
     
        [{Jargon File}]
     
        (1995-02-16)