any of several South American marmosets having long, silky fur, esp. any of a species (Saguinus tamarin) having black hands and feet
See tamarin in American Heritage Dictionary 4
(tămˈə-rĭn, -rănˌ)
noun
Any of various small, long-tailed, arboreal monkeys of the genera Leontideus and Saguinus of Central and South America, closely related to and resembling the marmosets but having a larger body, longer limbs, and lower canines that extend well beyond the incisors.