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noun
1.
Chemistry. a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base. Acids are proton donors that yield hydronium ions in water solution, or electron-pair acceptors that combine with electron-pair donors or bases.
2.
a substance with a sour taste.
3.
something, as a remark or piece of writing, that is sharp, sour, or ill-natured: His criticism was pure acid.
4.
Slang. LSD (def. 2).
adjective
5.
Chemistry.
a.
belonging or pertaining to acids or the anhydrides of acids.
b.
having only a part of the hydrogen of an acid replaced by a metal or its equivalent: an acid phosphate.
c.
having a pH value of less than 7. Compare alkaline (def. 4).
6.
sharp or biting to the taste; tasting like vinegar; sour: acid fruits.
7.
sharp, biting, or ill-natured in mood, manner, etc.: an acid remark; an acid wit.
8.
Geology. containing much silica.
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Acids
is always a great word to know.
So is lollapalooza. Does it mean:
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a scrap or morsel of food left at a meal. |
10.
put on the acid, Australian Slang. to importune someone, as for money, sexual favors, or confidential information.
Related forms
ac·id·ly, adverb
ac·id·ness, noun
non·ac·id, noun, adjective
pre·ac·id, adjective
pre·ac·id·ness, noun
EXPANDsem·i·ac·id, adjective
COLLAPSESynonyms
7. acerbic, stinging, vitriolic, tart. 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.
7. acerbic, stinging, vitriolic, tart. 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 Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To Acids
Etymonline
Word Origin & History
acid
1620s, from Fr. acide, from L. acidus "sour," adj. of state from acere "to be sour," from PIE base *ak- "sharp, pointed" (see acrid). Applied to intense colors from 1916. Slang meaning "LSD-25" first recorded 1966 (see LSD); acid rock (type played
EXPANDby 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." Acid test is Amer.Eng., 1892, from the frontier days, when gold was distinguished from similar metals by application of nitric acid. Acid rain is first recorded 1859 in ref. to England. Adj. acidic is attested from 1877, originally in geology.
COLLAPSE
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]
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
acid ac·id (ās'ĭd)
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.
See LSD.
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.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
acid  (ās'ĭd) Pronunciation Key
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. acidic adjective |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
acid definition
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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Slang Dictionary
acid definition
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Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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Copyright 2007. Published by McGraw Hill.
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American Heritage
Abbreviations & Acronyms
| ACIDS American College of Integrated Delivery Systems |
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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