/ Dictionary / Index B bronchus: Meaning and Definition of Find definitions for: bron•chus Pronunciation: (brong'kus), [key] — pl. -chi either of the two main branches of the trachea. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bronchus (Thesaurus) bronchospasm bronco Related Content Daily Word Quiz: gossamer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language