/ Dictionary / Index B bottlebrush grass: Meaning and Definition of Find definitions for: bot'tlebrush grass" Pronunciation: [key] a North American grass, Hystrix patula, having loose flower spikes with long awns. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bottlebrush bottle cap Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language