/ Dictionary / Index P propantheline bromide: Meaning and Definition of Find definitions for: pro•pan'the•line bro'mide Pronunciation: (prō-pan'thu-lēn", -lin), [key] — n. Pharm. a substance, CHBrNO, used in the treatment of peptic ulcers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propanoic acid proparoxytone Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language