noun
- a large pit viper, Bothrops atrox, of tropical America.
noun
- a large highly venomous tropical American snake, Trimeresurus (or Bothops) atrox, with a greyish-brown mottled coloration: family Crotalidae (pit vipers)
large poisonous snake of American tropics, 1880, from French, “lance-head,” literally “iron of a lance.” So called for its shape.