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2. a term sometimes used to refer to any venomous snake.
Old World viper true viper.
pit viper any of a family of venomous snakes found in North America including the many types of rattlesnakes (genera Crotalus and Sistrurus), as well as the copperheads and water moccasins (both of genus Agkistrodon).
Russell's viper Vipera russellii, a true viper of Southeast Asia whose venom (Russell's viper venom) is used in blood tests.
A member of the snake family Viperidae.
[L. vipera, serpent, snake]
viper/vi·per/ (vi´per) any venomous snake, especially any member of the families Viperidae (true vipers) and Crotalidae (pit vipers).
European viper Vipera berus, a venomous snake native to Europe, North Africa, and the Middle East.
Gaboon viper Bitis gabonica, a deadly, brightly marked, viperine snake found in tropical West Africa.
pit viper crotalid (1).
rhinoceros viper Bitis nasicornis, a venomous, brightly colored, viperine snake found in tropical Africa, having a pair of hornlike growths on its snout.
Russell's viper Vipera russelli, an extremely venomous, brightly colored, viperine snake of southeastern Asia and Indonesia.
sand viper Vipera ammodytes, a venomous snake found in southern Europe and Turkey that has a hornlike protuberance on its snout for burrowing.
true viper any of the snakes of the family Viperidae.
1. Any of various venomous snakes of the family Viperidae, having a thick heavy body and a single pair of long hollow fangs, especially the Eurasian and African species of the subfamily Viperinae, which lack the sensory pits of the pit vipers.
2. Any of several harmless snakes sometimes believed to be venomous.
any venomous snake, especially any member of the families Viperidae (true vipers) and Crotalidae (pit vipers).