/ Dictionary / Index T turtleback: Meaning and Definition of Find definitions for: tur•tle•back Pronunciation: (tûr'tl-bak"), [key] — n. tortoise-core. an oval or elliptical boss. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. turtle turtledove Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language