Either of two venomous green arboreal snakes of the genus Dendroaspis (family Elapidae), found in forests in Africa: the common D. angusticeps of southern Africa, and D. viridis of West Africa.
Origin
Mid 19th century.
Definition of green mamba in US English:
green mamba
noun
Either of two venomous green arboreal snakes of the genus Dendroaspis (family Elapidae), found in forests in Africa: the common D. angusticeps of southern Africa, and D. viridis of West Africa.