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Definition of viper:

  1. A dangerous, treacherous, or malignant person.
  2. Any one of numerous species of Old World venomous makes belonging to Vipera, Clotho, Daboia, and other genera of the family Viperidae.


bushmaster, black viper, fer-de-lance, copperhead, puff adder, pit viper, tree viper, rattlesnake, blowing viper, cobra, rhinoceros viper, water moccasin, asp, cottonmouth, sidewinder.

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