| either of two small, long-tailed monkeys, Saimiri oerstedii of Central America and S. sciureus of South America, having a small white face with black muzzle and gold, brown, or greenish fur: S. oerstedii is endangered. |
| squirrel monkey n. Any of several small, brightly colored arboreal monkeys of the genus Saimiri, widely distributed in South and Central American tropical forest regions, having a white face with black nose and mouth, short fur, and a long nonprehensile tail. |