(Science: zoology) Any one of several species of south American monkeys of the genus Pithecia. They have large ears, and a long hairy tail which is not prehensile.
The black saki (Pithecia satanas), the white-headed (P.leucocephala), and the red-backed, or hand-drinking, saki (P.chiropotes), are among the best-known.
Origin: Cf. F. & Pg. Saki; probably from the native name.