/ Dictionary / Index P pyridostigmine bromide: Meaning and Definition of Find definitions for: pyr•i•do•stig'mine bro'mide Pronunciation: (pir"i-dō-stig'mēn), [key] — Pharm. Pharm. a cholinesterase inhibitor, CHBrNO, used in its bromide form in the treatment of myasthenia gravis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pyridium pyridoxine Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language