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Noun genus crotalus has 1 sense
Crotalus, genus Crotalus - large rattlesnakes; seldom bite unless startled or pursuing prey--1 is a kind of reptile genus
 --1 is a member of Crotalidae, family Crotalidae
 --1 has members:
 |  | timber rattlesnake, banded rattlesnake, Crotalus horridus horridus; prairie rattlesnake, prairie rattler, Western rattlesnake, Crotalus viridis; sidewinder, horned rattlesnake, Crotalus cerastes; Western diamondback, Western diamondback rattlesnake, Crotalus atrox; rock rattlesnake, Crotalus lepidus; tiger rattlesnake, Crotalus tigris; Mojave rattlesnake, Crotalus scutulatus; speckled rattlesnake, Crotalus mitchellii | 
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