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