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Related to fer-de-lance: Bothrops
n. pl. fer-de-lance
Any of several tropical American pit vipers of the genus Bothrops, typically having brown and grayish markings.
[French, from fer de lance, spearhead : fer, iron + de, of + lance, spear.]
(Animals) a large highly venomous tropical American snake, Trimeresurus (or Bothops) atrox, with a greyish-brown mottled coloration: family Crotalidae (pit vipers)
[C19: from French, literally: iron (head) of a lance]
fer-de-lance(ˌfɛr dlˈæns, -ˈɑns)
a large pit viper, Bothrops atrox, of tropical America.
[1875–80; < French: literally, spearhead]