Source : Webster's Revised Unabridged Dictionary (1913)

Tamias \Ta"mi*as\, n. [NL., fr. Gr. ? a distributer.] (Zo["o]l.)
   A genus of ground squirrels, including the chipmunk.

Source : WordNet®

Tamias
     n : chipmunks of eastern North America [syn: {genus Tamias}]