man·ga·bey (mănggə-bā′, -bē′)
n. pl. man·ga·beys
Any of various large forest-dwelling African monkeys of two genera, one (Cercocebus) consisting of chiefly terrestrial species, and the other (Lophocebus) consisting of chiefly arboreal species.
[After Mangabey, a place in Madagascar from which Georges Louis Leclerc de Buffon received specimens of the animals, which he erroneously believed were native to the island.]
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