/ Dictionary / Index B barbiturism: Meaning and Definition of Find definitions for: bar•bi•tur•ism Pronunciation: (bär-bich'u-riz"um), [key] — n. Pathol. chronic poisoning caused by the excessive use of phenobarbital, secobarbital, or other derivative of barbituric acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. barbituric acid Barbizon School Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language