/ Dictionary / Index E eastern diamondback rattlesnake: Meaning and Definition of Find definitions for: east'ern di'amondback rat'tlesnake Pronunciation: [key] an extremely venomous diamondback rattlesnake, Crotalus adamanteus, of the southeastern U.S. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. eastern coral snake Eastern Empire Related Content Daily Word Quiz: abdicate Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language