mangabey
noun
man·ga·bey ˈmaŋ-gə-(ˌ)bē 
plural mangabeys
: any of a genus (Cercocebus) of slender long-tailed African monkeys
Example Sentences
Recent Examples on the Web Only twice, though, has anyone found active virus in wild animals: a rope squirrel from the Democratic Republic of Congo in the 1980s, and a sooty mangabey, found in Côte d’Ivoire about a decade ago. 
Katherine J. Wu, The Atlantic, 21 June 2022 The birth of this little adventurer brings the London Zoo’s white-naped mangabey troop to a total of eight. Kelli Bender, PEOPLE.com, 29 Aug. 2019 Over the past few weeks, Buzz the mangabey has stayed close to mom, leaving her to learn how to forage and nurse at the same time. Kelli Bender, PEOPLE.com, 29 Aug. 2019 To visit Buzz no trips to the moon are needed, the little white-naped mangabey is already on exhibit at the London Zoo. Kelli Bender, PEOPLE.com, 29 Aug. 2019 Although mangabeys are known to use tools, researchers have not yet observed them wielding fly swatters. Eva Frederick, Science | AAAS, 12 July 2019 The marked flies kept turning up around the mangabeys, even 12 days later when the group had moved more than 1 kilometer away, the team reports in Molecular Ecology. Eva Frederick, Science | AAAS, 12 July 2019 See More
Katherine J. Wu, The Atlantic, 21 June 2022 The birth of this little adventurer brings the London Zoo’s white-naped mangabey troop to a total of eight. Kelli Bender, PEOPLE.com, 29 Aug. 2019 Over the past few weeks, Buzz the mangabey has stayed close to mom, leaving her to learn how to forage and nurse at the same time. Kelli Bender, PEOPLE.com, 29 Aug. 2019 To visit Buzz no trips to the moon are needed, the little white-naped mangabey is already on exhibit at the London Zoo. Kelli Bender, PEOPLE.com, 29 Aug. 2019 Although mangabeys are known to use tools, researchers have not yet observed them wielding fly swatters. Eva Frederick, Science | AAAS, 12 July 2019 The marked flies kept turning up around the mangabeys, even 12 days later when the group had moved more than 1 kilometer away, the team reports in Molecular Ecology. Eva Frederick, Science | AAAS, 12 July 2019 See More Word History
Etymology
French, from Mangabe, town in eastern Madagascar
First Known Use
1774, in the meaning defined above