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.
Origin: 1880–85; < F, equiv. to ver(t) green (see vert) + (gri)vetgrivet
ver·vet (vûr'vĭt) n. A small, long-tailed African monkey (Cercopithecus aethiops) having a black face with white cheek tufts and a yellowish-brown or greenish coat. Several subspecies of vervets have been recognized within a large range including most of sub-Saharan Africa. Also called green monkey, grivet.
[French : vert, green (from Old French verd; see verdant) + (gri)vet, grivet.]
African monkey, 1884, from Fr., of unknown origin, perhaps short for vert grivet, lit. "a green grivet," indicating it was greener than the kind of monkey known as a grivet (itself a name of unknown origin).