'Crotalus' definitions:

Definition of 'Crotalus'

(from WordNet)
noun
Large rattlesnakes; seldom bite unless startled or pursuing prey [syn: Crotalus, genus Crotalus]

Definition of 'Crotalus'

From: GCIDE
  • Crotalus \Crot"a*lus\ (-l?s), n. [NL., fr. Gr. ???? rattle.] (Zool.) A genus of poisonous serpents, including the rattlesnakes. [1913 Webster]