Meaning of PIT VIPER

Pronunciation:			pit 'vIpur
WordNet Dictionary
	Definition:		[n]  New World vipers with hollow fangs and a heat-sensitive pit on each side of the head
	See Also:		Agkistrodon contortrix, Agkistrodon piscivorus, Bothrops atrops, copperhead, cottonmouth, cottonmouth moccasin, Crotalidae, family Crotalidae, fer-de-lance, rattler, rattlesnake, viper, water moccasin