/ Dictionary / Index A arrowroot: Meaning and Definition of Find definitions for: ar•row•root Pronunciation: (ar'ō-rt", -root"), [key] — n. a tropical American plant, Maranta arundinacea, the rhizomes of which yield a nutritious starch. the starch itself. any of several other plants yielding a similar starch. the starch of these plants, used in cooking as a binder or thickener. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arrowroot (Thesaurus) arrowhead Arrowsmith* Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language