A large venomous snake of forests in West and central Africa, Bitis nasicornis, having bold markings and a pair of hornlike scales on the snout; also called river jack.
Origin
Late 19th century.
Definition of rhinoceros viper in US English:
rhinoceros viper
noun
A large venomous snake of forests in West and central Africa, Bitis nasicornis, having bold markings and a pair of hornlike scales on the snout; also called river jack.