Main Entry: vi·per

Pronunciation: \ˈvī-pər\

Function: noun

1 : a common Eurasian venomous snake of the genus Vipera (V. berus) that attains a length of about two feet (0.6 meter), varies in color from red, brown, or gray with dark markings to black, and whose bite is usually not fatal to humans ; broadly : any snake of an Old World subfamily (Viperinae) of the family Viperidae
2 : pit viper
3 : a venomous or reputedly venomous snake