/ Dictionary / Index B bitter principle: Meaning and Definition of Find definitions for: bit'ter prin"ciple Pronunciation: [key] — Chem. Chem. any of several hundred natural compounds, usually of vegetable origin, having a bitter taste, and not admitting of any chemical classification. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bitter pill bitterroot Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language