an African monkey, Cercopithecus aethiops pygerythrus, allied to the green monkey and the grivet, but distinguished by a rusty patch at the root of the tail.
any of several common, closely allied long-tailed monkeys of African savannas ranging from Senegal to South Africa, including the green monkey, grivet, tantalus, and vervet, which are sometimes considered subspecies and classified together as Cercopithecus aethiops.
