/ Dictionary / Index R rootcap: Meaning and Definition of Find definitions for: root•cap Pronunciation: (rt'kap", root'-), [key] — n. Bot. the loose mass of epidermal cells covering the apex of most roots, serving to protect the meristematic cells behind it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. root canal therapy root cellar Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language