/ 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: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language