/ Dictionary / Index B benzethonium chloride: Meaning and Definition of Find definitions for: ben•ze•tho'ni•um chlo'ride Pronunciation: (ben"zu-thō'nē-um), [key] — Chem. Chem. a colorless, water-soluble, crystalline solid, ammonium chloride derivative, (CHON)Cl&multiplydot;HO, used chiefly as an antiseptic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. benzenoid Benzi Box Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language