/ Dictionary / Index B barrel cactus: Meaning and Definition of Find definitions for: bar'rel cac"tus Pronunciation: [key] any of several large, cylindrical, ribbed, spiny cacti of the genera Echinocactus and Ferocactus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. barrel bolt barrel chair Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language