acid

[as-id]
|||

noun

adjective


Idioms

    put on the acid, Australian Slang. to importune someone, as for money, sexual favors, or confidential information.

Origin of acid

1620–30; < Latin acidus sour, akin to ācer sharp, acētum vinegar, acescent, acicula
Related formsac·id·ly, adverbac·id·ness, nounnon·ac·id, noun, adjectivepre·ac·id, adjectivepre·ac·id·ness, nounsem·i·ac·id, adjective
Can be confusedacerbic acid acrid

Synonyms for acid

7. acerbic, stinging, vitriolic, tart.

Synonym study

7. Acid, astringent are terms used figuratively of wit or humor. Acid suggests a sharp, biting, or ill-natured quality: an acid joke about an opponent. Astringent connotes severity but usually also a bracing quality, as of something applied with curative intent: astringent criticism.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


Examples from the Web for acid

Contemporary Examples of acid

Historical Examples of acid


British Dictionary definitions for acid

acid

noun

any substance that dissociates in water to yield a sour corrosive solution containing hydrogen ions, having a pH of less than 7, and turning litmus redSee also Lewis acid
a sour-tasting substance
a slang name for LSD

adjective

chem
  1. of, derived from, or containing acidan acid radical
  2. being or having the properties of an acidsodium bicarbonate is an acid salt
sharp or sour in taste
cutting, sharp, or hurtful in speech, manner, etc; vitriolic; caustic
(of rain, snow, etc) containing pollutant acids in solution
(of igneous rocks) having a silica content of more than 60% of the total and containing at least one tenth quartz
metallurgy of or made by a process in which the furnace or converter is lined with an acid materialacid steel
Derived Formsacidly, adverbacidness, nounacidy, adjective

Word Origin for acid

C17: (first used by Francis Bacon): from French acide or Latin acidus, from acēre to be sour or sharp
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 acid
adj.

1620s, "of the taste of vinegar," from French acide (16c.) or directly from Latin acidus "sour, sharp," adjective of state from acere "to be sour," from PIE root *ak- "sharp, pointed" (see acrid). Figurative use from 1775; applied to intense colors from 1916. Acid test is American English, 1892, from the frontier days, when gold was distinguished from similar metals by application of nitric acid. Acid rain is first recorded 1859 in reference to England.

n.

1690s, from acid (adj.). Slang meaning "LSD-25" first recorded 1966 (see LSD).

When I was on acid I would see things that looked like beams of light, and I would hear things that sounded an awful lot like car horns. [Mitch Hedberg, 1968-2005, U.S. stand-up comic]

Acid rock (type played by or listen to by people using LSD) is also from 1966; acid house dance music style is 1988, probably from acid in the hallucinogenic sense + house "dance club DJ music style."

Online Etymology Dictionary, © 2010 Douglas Harper

acid in Medicine

acid

[ăsĭd]

n.

Any of a large class of sour-tasting substances whose aqueous solutions are capable of turning blue litmus indicators red, of reacting with and dissolving certain metals to form salts, and of reacting with bases or alkalis to form salts.
A substance that ionizes in solution to give the positive ion of the solvent.
A substance capable of yielding hydrogen ions.
A proton donor.
An electron acceptor.
A molecule or ion that can combine with another by forming a covalent bond with two electrons of the other.
A substance having a sour taste.
LSD

adj.

Of or relating to an acid.
Having a high concentration of acid.
Having a sour taste.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

acid in Science

acid

[ăsĭd]

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.
Related formsacidic adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

acid in Culture

acid

A sour-tasting material (usually in a solution) that dissolves metals and other materials. Technically, a material that produces positive ions in solution. An acid is the opposite of a base and has a pH of 0 to 7. A given amount of an acid added to the same amount of a base neutralizes the base, producing water and a salt. Common vinegar, for example, is a weak solution of acetic acid.

Note

Figuratively, acid applies to anything sour or biting; for example, an “acid wit” is sharp and unpleasant.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.