Source : Webster's Revised Unabridged Dictionary (1913)

Tamarin \Tam"a*rin\, n. [From the native name in Cayenne.]
   (Zo["o]l.)
   Any one of several species of small squirrel-like South
   American monkeys of the genus {Midas}, especially {M.
   ursulus}.

Source : WordNet®

tamarin
     n : small South American marmoset with silky fur and long
         nonprehensile tail [syn: {lion monkey}, {lion marmoset},
         {leoncita}]