Mangabey \Man"ga*bey\, n. [So called by Buffon from Mangaby, in
Madagascar, where he erroneously supposed them be native.]
(Zool.)
Any one of several African monkeys of the genus {Cercocebus},
as the sooty mangabey ({Cercocebus fuliginosus}), which is
sooty black. [Also written {mangaby}.]
[1913 Webster]