/ Dictionary / Index N nitrosylsulfuric acid: Meaning and Definition of Find definitions for: ni'trosylsulfu'ric ac'id Pronunciation: [key] — Chem. Chem. a clear, straw-colored, oily, corrosive liquid, HNOS, used chiefly in the manufacture of dyes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nitrosylsulfuric nitrous Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language