crotalid


viper

 [vi´per] 1. any snake of the viperid and crotalid families (the true vipers and the pit vipers).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 moccasins" >water moccasins (both of genus Agkistrodon).Russell's viper Vipera russellii, a viper" >true viper of Southeast Asia whose venom (venom" >Russell's viper venom) is used in blood tests.true viper any of a large family of venomous snakes found in Africa, parts of Europe, Asia, and adjacent islands, but not in the Americas or Australia; it includes cobras and adders, among others. Called also Old World viper, viperid, and viperine.

cro·ta·lid

(krō'tă-lid), Any member of the snake family Crotalidae.