a common savanna monkey, Cercopithecus aethiops sabaeus, of West Africa, with a greenish-gray back and yellow tail.
Origin of green monkey
First recorded in 1830–40
Also called African green monkey.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for african green monkey
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012