/ Dictionary / Index B bitterroot: Meaning and Definition of Find definitions for: bit•ter•root Pronunciation: (bit'ur-rt", -root"), [key] — n. a plant, Lewisia rediviva, of the purslane family, having pink flowers and fleshy roots that are edible when young: the state flower of Montana. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bitterroot (Thesaurus) bitter principle Bitterroot Range Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language