/ Dictionary / Index A acid test ratio: Meaning and Definition of Find definitions for: ac'id test' ra"tio Pronunciation: [key] a ratio of cash, receivables, and marketable securities to current liabilities, used in determining credit risks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acid test acid-tongued Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language