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acid definition

acid (as′id)

adjective

  1. sharp and biting to the taste; sour; tart
  2. sharp or sarcastic in temperament or speech
  3. that is, or has the properties of, an acid
  4. having too heavy a concentration of acid

Etymology: L acidus, sour < IE base *a-, sharp, pointed > ear

noun

  1. a sour substance
  2. Slang LSD
  3. Chem. any compound that can react with a base to form a salt, the hydrogen of the acid being replaced by a positive ion; in modern theory, any substance that produces a positive ion and accepts electrons from a base to form covalent bonds: in water solution an acid tastes sour, turns blue litmus paper red, and, in the dissociation theory, produces free hydrogen ions

Related Forms:

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Alternate definitions:

medical acid definition - medical

acid Synonyms

acid

modif.

  1. Having the characteristics of an acid

    sharp, tart, biting; see sour 1.

  2. Having the properties of an acid

    corrosive, erosive, eroding, corroding, oxidizing, rusting, eating away, biting, disinfectant, disintegrative, dissolvent, bleaching, acidic, anti-alkaline.

  3. Cutting or sarcastic

    biting, sharp, barbed, astringent; see sarcastic. See syn. study atsour.


acid

n.

  1. A sour substance

    acidulous compound, corrosive, Lewis acid, hydrogen-ion concentration.

  2. *A drug

    LSD, D-lysergic acid diethylamide, hallucinogen, psychedelic; see drug 2.

    Common acids include: vinegar, acetic acid, verjuice, lemon juice; citric, ascorbic, lactic, malic, formic, tannic, tartaric, nicotinic, boric, acetic, sulfuric, muriatic, hydrochloric, hydrosulfurous, hydrobromic, hydrofluoric, hydrocyanic, hydroferrocyanic, hydriodic, hyponitrous, sulfonic, phosphoric, carbolic, nitric, benzoic, amino, monobasic, dibasic, polybasic acid, aqua regia (Latin).


Webster's New World Roget's A-Z Thesaurus Copyright © 1999 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

acid Usage Examples

Converse of object

  • dilute: The free fatty acids are then released from the sodium salts by adding a dilute acid.

Adjective modifier

  • fatty: Some common fatty acids are shown below: Solid or Liquid?

Modifies a noun

  • grassland: In 1990 lowland acid grassland was estimated to cover a total area of 560 ha.

Noun used with modifier

  • amino: Proteins are made of long chains of even smaller building blocks called amino acids.
acid usage examples (more)

The word usage examples above have been gathered from various sources to reflect current and historical usage. They do not represent the opinions of YourDictionary.com.

acid quotes

One misses the hiss of acid.

-Lehmann-Haupt, Christopher Charles Herbert

The Electric Kool-Aid Acid Test

-Wolfe,Tom (Thomas Kennerley)

First deal with your own tears; tomorrow do something about acid rain.

-Wylie, BettyJane

acid quotes (more)

Webster's New World Dictionary of Quotations Copyright © 2005 by Chambers Harrap Publishers Ltd. All rights reserved. Published by Wiley, Hoboken, NJ. Used by arrangement with John Wiley & Sons, Inc.

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MLA Style

"acid." Webster's New World College Dictionary. 2009

  • Your Dictionary. 4 July 2009
  • <www.yourdictionary.com/acid>

APA Style

acid. (2009). In Webster's New World College Dictionary

  • Retrieved July 4th, 2009, from www.yourdictionary.com/acid

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