/ Dictionary / Index A acid drop: Meaning and Definition of Find definitions for: ac'id drop" Pronunciation: [key] — Brit. Brit. a tart candy, as a sourball. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acid cell acid dust Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language