| crotalid | <herpetology> Any member of the snake family Crotalidae. (05 Mar 2000) |
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| crotalid venom | <herpetology> Venoms from snakes of the subfamily crotalinae or pit vipers, found mostly in the americas. They include the rattlesnake, cottonmouth, fer-de-lance, bushmaster, and american copperhead. Their venoms contain nontoxic proteins, cardio-, haemo-, cyto-, and neurotoxins, and many enzymes, especially phospholipases a. Many of the toxins have been characterised. (12 Dec 1998) |
| Crotalidae | <herpetology> A family of New World vipers characterised by the presence of a heat-sensitive loreal pit between each eye and nostril, and folding, caniculated, long anterior fangs. (05 Mar 2000) |