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diamondback rattlesnake

Either of two large venomous rattlesnakes (Crotalus adamanteus or C. atrox) found in the southern and western United States and in Mexico and having diamond-shaped markings on the back.

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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