• synonyms


See more synonyms for acidic on Thesaurus.com
  1. acid(def 5).
  2. Geology. acid(def 8).
  3. acid-forming(def 1).
  4. containing acid-bearing pollutants: Acidic runoff is poisoning the nation's rivers.
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Origin of acidic

First recorded in 1875–80; acid + -ic
Related formsnon·a·cid·ic, adjectivesem·i·a·cid·ic, adjectiveun·a·cid·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for acidic

sour, astringent

Examples from the Web for acidic

Contemporary Examples of acidic

Historical Examples of acidic

British Dictionary definitions for acidic


  1. another word for acid
  2. (of an oxide) yielding an acid in aqueous solution
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for acidic


1877, originally in geology; see acid (n.) + -ic.

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Online Etymology Dictionary, © 2010 Douglas Harper

acidic in Science


  1. Any of a class of compounds that form hydrogen ions when dissolved in water, and whose aqueous solutions react with bases and certain metals to form salts. Acids turn blue litmus paper red and have a pH of less than 7. Their aqueous solutions have a sour taste. Compare base.
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Related formsacidic adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.