/ Dictionary / Index H horse balm: Meaning and Definition of Find definitions for: horse' balm" Pronunciation: [key] a lemon-scented plant, Collinsonia canadensis, of eastern North America, having small yellow flowers. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. horseback horse bean Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language