Source : Webster's Revised Unabridged Dictionary (1913)

Marmot \Mar"mot\, n. [It. marmotta, marmotto, prob. fr. L. mus
   montanus, or mus montis, lit., mountain mouse or rat. See
   {Mountain}, and {Mouse}.]
   1. (Zo["o]l.) Any rodent of the genus {Arctomys}. The common
      European marmot ({A. marmotta}) is about the size of a
      rabbit, and inhabits the higher regions of the Alps and
      Pyrenees. The bobac is another European species. The
      common American species ({A. monax}) is the woodchuck.

Source : WordNet®

marmot
     n : stocky coarse-furred burrowing rodent with a short bushy
         tail found throughout the northern hemisphere; hibernates
         in winter