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Meaning of pit viper

pit' vi"per

Pronunciation: [key]
  1. any of numerous venomous snakes of the family Crotalidae, of the New World, Asia, and the Malay Archipelago, as the rattlesnake, water moccasin, and copperhead, having a heat-sensitive pit on each side of the head between the eye and nostril.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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