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acid - 13 dictionary results

ac⋅id

[as-id]

Use acid in a Sentence

–noun

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

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.

9.	Metallurgy. noting, pertaining to, or made by a process in which the lining of the furnace, or the slag that is present, functions as an acid in high-temperature reactions in taking electrons from oxide ions: usually a siliceous material, as sand or ganister. Compare basic (def. 3).

—Idiom

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

Origin:
1620–30; < L acidus sour, akin to ācer sharp, acētum vinegar, acescent, acicula

Related forms:

ac⋅id⋅ly, adverb

ac⋅id⋅ness, noun

Synonyms:
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. 2009.
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Link To acid

ac·id (ās'ĭd)

Chemistry
1. Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.
2. A substance that yields hydrogen ions when dissolved in water.
3. A substance that can act as a proton donor.
4. A substance that can accept a pair of electrons to form a covalent bond.
A substance having a sour taste.
The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.
Slang See LSD¹.

adj.

Chemistry
1. Of, relating to, or containing an acid.
2. Having a high concentration of acid.
3. Having the characteristics of an acid.
4. Having a pH of less than 7.
5. Having a relatively high concentration of hydrogen ions.
1. Having a pH of less than 7.
2. Having a relatively high concentration of hydrogen ions.
Geology Containing a large proportion of silica: acid rocks.
Having a sour taste. See Synonyms at sour.
Biting, sarcastic, or scornful: an acid wit; an acid tone of voice.

[From Latin acidus, sour, from acēre, to be sour; see ak- in Indo-European roots.]
ac'id·ly adv., ac'id·ness n.

LSD¹ (ěl'ěs-dē')

n. A crystalline compound, C₂₀H₂₅N₃O, derived from lysergic acid and used as a powerful hallucinogenic drug. Also called acid.

[l(y)s(ergic acid) d(iethylamide).]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Acid

Ac"id\, a. [L. acidus sour, fr. the root ak to be sharp: cf. F. acide. Cf. Acute.]

1. Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour-tempered.

He was stern and his face as acid as ever. --A. Trollope.

2. Of or pertaining to an acid; as, acid reaction.

Acid

Ac"id\, n. 1. A sour substance.

2. (Chem.) One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids.

Note: In certain cases, sulphur, selenium, or tellurium may take the place of oxygen, and the corresponding compounds are called respectively sulphur acids or sulphacids, selenium acids, or tellurium acids. When the hydrogen of an acid is replaced by a positive element or radical, a salt is formed, and hence acids are sometimes named as salts of hydrogen; as hydrogen nitrate for nitric acid, hydrogen sulphate for sulphuric acid, etc. In the old chemistry the name acid was applied to the oxides of the negative or nonmetallic elements, now sometimes called anhydrides.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : acid

Spanish: ácido,

German: sauer,

Japanese: 酸っぱい

More Translations »

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.

acid

1626, 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 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," probably from the Warehouse, a Chicago nightclub where the style originated. 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.

Main Entry: ¹ac·id
Pronunciation: 'as-&d
Function: adjective
1 : sour, sharp, or biting to the taste
2 a : of, relating to, or being an acid; also : having the reactions or characteristics of an acid acid solution> b of salts and esters : derived bypartial exchange of replaceable hydrogen <acid sodium carbonate NaHCO₃> c : marked by or resulting from an abnormally high concentration of acid <acidindigestion> —not used technically

Main Entry: ²acid
Function: noun
1 : a sour substance; specifically : any of various typically water-soluble and sour compounds that insolution are capable of reacting with a base to form a salt, that redden litmus, that have a pH less than 7, and that are hydrogen-containing molecules or ions able to give up a proton to a base or aresubstances able to accept an unshared pair of electrons from a base
2 : LSD

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.

adj.

Of or relating to an acid.
Having a high concentration of acid.
Having a sour taste.

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

ACID programming
A mnemonic for the properties a transaction should have to satisfy the Object Management Group Transaction Service specifications. A transaction should be Atomic, its result should be Consistent, Isolated (independent of other transactions) and Durable (its effect should be permanent).
The Transaction Service specifications which part of the Object Services, an adjunct to the CORBA specifications.
(1997-05-15)

ACID
aircraft identification

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