Pit viper

noun

Definitions

Noun
  1. 1
    Any of various venomous snakes, of the subfamily Crotalinae, found in Asia and the Americas, with a deep pit or fossa on either side of the head that enables them to detect prey by infrared.
  2. 2
    New World vipers with hollow fangs and a heat-sensitive pit on each side of the head wordnet

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