/ Dictionary / Index M mixed acid: Meaning and Definition of Find definitions for: mixed' ac'id Pronunciation: [key] any mixture of nitric acid and sulfuric acid, used as a nitrating agent in the manufacture of explosives, plastics, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mixed mixed bag Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language