acid


Also found in: Thesaurus, Medical, Legal, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia.
Related to acid: acid reflux, soap, Acid and base

ac·id

 (ăs′ĭd)
n.
1. Chemistry
a. 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.
b. A substance that yields hydrogen ions when dissolved in water.
c. A substance that can act as a proton donor.
d. A substance that can accept a pair of electrons to form a covalent bond.
2. A substance having a sour taste.
3. The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.
4. Slang See LSD1.
adj.
1. Chemistry
a. Of, relating to, or containing an acid.
b. Having a high concentration of acid.
c. Having the characteristics of an acid.
2.
a. Having a pH of less than 7.
b. Having a relatively high concentration of hydrogen ions.
3. Geology Containing a large proportion of silica: acid rocks.
4. Having a sour taste. See Synonyms at sour.
5. 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.

acid

(ˈæsɪd)
n
1. (Chemistry) 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 red. See also Lewis acid
2. a sour-tasting substance
3. (Recreational Drugs) a slang name for LSD
adj
4. (Chemistry) chem
a. of, derived from, or containing acid: an acid radical.
b. being or having the properties of an acid: sodium bicarbonate is an acid salt.
5. sharp or sour in taste
6. cutting, sharp, or hurtful in speech, manner, etc; vitriolic; caustic
7. (Environmental Science) (of rain, snow, etc) containing pollutant acids in solution
8. (Geological Science) (of igneous rocks) having a silica content of more than 60% of the total and containing at least one tenth quartz
9. (Metallurgy) metallurgy of or made by a process in which the furnace or converter is lined with an acid material: acid steel.
[C17: (first used by Francis Bacon): from French acide or Latin acidus, from acēre to be sour or sharp]
ˈacidly adv
ˈacidness n
ˈacidy adj

ac•id

(ˈæs ɪd)

n.
1. a compound usu. having a sour taste and capable of neutralizing alkalis and turning blue litmus paper red, 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.
2. a substance with a sour taste.
3. biting criticism or sarcasm.
4. Slang. the drug LSD.
adj.
5.
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.
6. characterized by a high concentration of acid.
7. sharp or biting to the taste; sour: acid fruits.
8. sharp, biting, or ill-natured in mood or manner; caustic: acid wit.
9. vividly intense in color: acid green.
10. (of igneous rock) rich in silica.
[1620–30; < Latin acidus sour, akin to ācer sharp, acētum vinegar, acicula]
ac′id•ly, adv.
ac′id•ness, n.

ac·id

(ăs′ĭd)
Any of a class of compounds that form hydrogen ions when dissolved in water. They also react, in solution, with bases and certain metals to form salts. Acids turn blue litmus paper red, have a sour taste, and have a pH of less than 7. Compare base.

acidic adjective

acid

A solution of a substance in water which has a pH of less than 7.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.acid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a saltacid - any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
alcapton, alkapton, homogentisic acid - an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine
arsenic acid - an acid formed from arsenic pentoxide
cerotic acid, hexacosanoic acid - a white solid fatty acid found in waxes (such as beeswax)
chloric acid - (HClO3) a strong unstable acid with an acrid odor found in chlorate salts
chlorous acid - (HClO2) a strongly oxidizing acid; known only in solution
monobasic acid - an acid containing only one replaceable hydrogen atom per molecule
dibasic acid - an acid containing two replaceable hydrogen atoms per molecule
tribasic acid - an acid containing three replaceable hydrogen atoms per molecule
tetrabasic acid - an acid containing four replaceable hydrogen atoms per molecule
fulminic acid - (CNOH) an unstable acid occurring mainly in the form of explosive salts and esters that is isomeric with cyanic acid
gamma acid - a crystalline acid used to make azo dyes
hydriodic acid - (HI) a colorless or yellow aqueous solution of hydrogen iodide; "hydriodic acid is a strong acid"
hydrocyanic acid, prussic acid - a solution of hydrogen cyanide in water; weak solutions are used in fumigating and in the synthesis of organic compounds
hydroxy acid - any acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself
hyponitrous acid - an explosive white crystalline weak acid (H2N2O2)
lysergic acid - a crystalline acid often used in medical research; obtained from ergotic alkaloids
manganic acid - a dibasic acid (H2MnO4) found only in solution and in manganate salts
2-methylpropenoic acid, methacrylic acid - an unsaturated acid (C4H6O2) used to make resins and plastics
selenic acid - a strong acid (H2SeO4) analogous to sulfuric acid
sulfonic acid, sulphonic acid - an acid derived from sulphuric acid
titanic acid - a white weak acid that is a hydrated form of titanium dioxide
perchloric acid - a powerful oxidizing agent; forms perchlorates
carboxylic acid - an organic acid characterized by one or more carboxyl groups
aminobenzoic acid - a derivative of benzoic acid
aqua fortis, nitric acid - acid used especially in the production of fertilizers and explosives and rocket fuels
nitrous acid - an unstable inorganic acid known only in solution and as nitrite salts
aqua regia, nitrohydrochloric acid - a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)
barbituric acid, malonylurea - a white crystalline acid derived from pyrimidine; used in preparing barbiturate drugs
lansoprazole, Prevacid - antacid (trade name Prevacid) that suppresses acid secretion in the stomach
boracic acid, boric acid - any of various acids containing boron and oxygen
boric acid, orthoboric acid - a white or colorless slightly acid solid that is soluble in water and ethanol; used in the manufacture of glass and paper and adhesives and in detergents and as a flux in welding; also used as an antiseptic and food preservative
bromic acid - an unstable acid used as an oxidizing agent
carbamic acid - an acid that is known only by virtue of its salts (as ammonium carbamate) or its esters (as urethane)
carbolic acid, hydroxybenzene, oxybenzene, phenylic acid, phenol - a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally
carbonic acid - a weak acid known only in solution; formed when carbon dioxide combines with water
chromic acid - an unstable acid known only in solution and as chromate salts
citric acid - a weak water-soluble acid found in many fruits (especially citrus fruits); used as a flavoring agent
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
cyanamid, cyanamide - a weak soluble dibasic acid (the parent acid of cyanamide salts)
cyanic acid - a colorless poisonous volatile liquid acid that hydrolyzes readily to ammonia and carbon dioxide
cyanuric acid - a trimer of cyanic acid
ferricyanic acid - a brown unstable acid formed from ferricyanide
ferrocyanic acid - a white unstable acid formed from ferrocyanide salts
fluoroboric acid - an acid of fluorine and boron
fluosilicic acid, hydrofluosilicic acid - an unstable poisonous corrosive acid known primarily in the form of its salts
2.acid - street name for lysergic acid diethylamideacid - street name for lysergic acid diethylamide
LSD, lysergic acid diethylamide - a powerful hallucinogenic drug manufactured from lysergic acid
Adj.1.acid - harsh or corrosive in toneacid - harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
unpleasant - disagreeable to the senses, to the mind, or feelings ; "an unpleasant personality"; "unpleasant repercussions"; "unpleasant odors"
2.acid - being sour to the taste
sour - having a sharp biting taste
3.acid - having the characteristics of an acid; "an acid reaction"
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
acidic - being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7)

acid

the acid test test, proof, trial, check, investigation, analysis, assessment, examination The perception of fairness is the acid test for democracy.

Acids

Specific acids  abietic acid, acetic acid, alginic acid, aminobenzoic acid, aspartic acid, barbituric acid, benzoic acid, boric acid, butyric acid, carbonic acid, chloric acid, chloroacetic acid, chlorous acid, cholic acid, chromic acid, cinnamic acid, citric acid, crotonic acid, cyanic acid, decanedioic acid, decanoic acid, dichromic acid, dithionous acid, deoxyribonucleic acid, dodecanoic acid, erucic acid, formic acid, fulminic acid, fumaric acid, gallic acid, glacial acetic acid, glyceric acid, heptadecanoic acid, hexanoic acid, hydnocarpic acid, hydrochloric acid, hydrofluoric acid, hypochlorous acid, hypophosphoric acid, hypophosphorous, isocyanic acid, itaconic acid, lactic acid, linoleic acid, linolenic acid, lysergic acid, manganic acid, mucic acid, nitric acid, nitrous acid, nonanoic acid, octanedioic acid, oleic acid, orthophosphoric acid, oxalic acid, pantothenic acid, para-aminobenzoic acid, pectic acid, pentanoic acid, permanganic acid, phosphoric acid, phthalic acid, picric acid, platinocyanic acid, polyphosphoric acid, propanoic acid, prussic acid, pyroboric acid, pyrophosphoric acid, pyrosulphuric acid, racemic acid, ricinoleic acid, saccharic acid, selenic acid, selenious acid, silicic acid, sorbic acid, spiraeic acid (modern salicylic acid), stearic acid, suberic acid, succinic acid, sulphonic acid, sulphurous acid, tantalic acid, tartaric acid, telluric acid, terebic acid, terephthalic acid, thiocyanic acid, thiosulphuric acid, trichloroacetic acid, uric acid
Types of acid  amino acid, carboxylic acid, dibasic acid, dicarboxylic acid, fatty acid, iodic acid, mineral acid, nucleic acid, periodic acid, polycarboxylic acid
Amino acids  alanine, arginine, citrulline, cystine, glutamine, glycine, histidine, isoleucine, leucine, lysine, ethionine, ornithine, proline, serine, threonine, triiodothyronine

acid

adjective
1. Having a taste characteristic of that produced by acids:
Translations
حامِضحَمْضحِمْض، مَادَّة حَامِضِيَّهلاذِع، قَارِص
киселкиселинен
àcid
kyselinakyselýsarkastickýjedovatý
syre-syresyre-sursure
Säuresaueracet-beißendLysergsäure-diethylamid
hapehappelinehapukibe
happoainehapanhapokas
kiselinakiselinskikiseo
sav
beiskbeisktbeiskurmeinhæðiðmeinhæðin
酸性すっぱい
산성의시다
kandusrūgštingumasrūgštisrūgštus
skābeskābsassdzēlīgsskāba
അമ്ലം
kwaskwaśnakwaśnekwaśny
acidacidul lisergic dietilamida-25
kyselinakyslý
kiselkislakisla snovkislinakislo
kiselina
syrasyra-acidsur
กรด
تیزاب
axit

acid

[ˈæsɪd]
A. N
1. (Chem) → ácido m
2. (= drug) → ácido m
to drop acidconsumir ácido
B. ADJ
1. (= not alkaline) [soil, food, conditions] → ácido
2. (= sharp, bitter) [fruit, taste] → ácido
3. (fig) [remark, tone] → mordaz; [voice] → agrio, mordaz
to have an acid tonguetener la lengua viperina
C. CPD acid drops NPL (Brit) → caramelos mpl ácidos
acid green Nverde m limón
acid head N (Drugs) → adicto/a m/f al ácido
acid house (music) Nmúsica f acid
acid house party Nfiesta f acid
acid rain Nlluvia f ácida
acid rock N (Mus) → rock m acid
the acid test N (fig) → la prueba de fuego, la prueba decisiva
acid yellow Namarillo m limón

acid

[ˈæsɪd] n (CHEMISTRY)acide m citric acid, hydrochloric acid

acid

adj
(= sour, also Chem) → sauer
(fig)ätzend, beißend
n
(Chem) → Säure f
(inf: = LSD) → Acid nt (sl); to drop acidAcid nehmen (sl)

acid

:
acid-proof
acid rain
acid rock
n (Mus) → Acid Rock m
acid test
nFeuerprobe f
acid-tongued
adj person, remarkscharfzüngig

acid

[ˈæsɪd]
1. n (Chem) (drug) → acido
2. adj (Chem) → acido/a; (sour) → acido/a, acidulo/a (fig) (wit, remark) → caustico/a
acid salts (Chem) → sali mpl acidi
acid oxides (Chem) → ossiacidi mpl

acid

(ˈӕsid) adjective
1. (of taste) sharp or sour. Lemons and limes are acid fruits.
2. sarcastic. acid humour.
noun
a substance, containing hydrogen, which will dissolve metals etc. She spilled some acid which burned a hole in her dress.
aˈcidity noun
the quality of containing acid or too much acid.

acid

حَمْض kyselina syre Säure οξύ ácido happo acide kiselina acido zuur syre kwas ácido кислота syra กรด asit axit

ac·id

n. ácido;
acetic ______ acético;
boric ______ bórico;
___ -fastacidorresistente;
___ -proofa prueba de ___;
aminoacetic ______ aminoacético (suplemento dietético);
ascorbic ______ ascórbico;
aspartic ______ aspártico;
boric ______ bórico;
butyric ______ butírico;
chlorogenic ______ clorogénico;
cholic ______ cólico;
citric ______ cítrico;
deoxyribonucleic ______ desoxirribonucleico;
fatty ______ graso;
folic ______ fólico;
gastric ______ gástrico;
glucuramic ______ glucurámico;
glutamic ______ glutámico;
glycolic ______ glicólico;
lactic ______ láctico;
nicotinic ______ nicotínico;
nitric ______ nítrico;
nucleic ______ nucleico;
phenic ______ fenílico;
ribonucleic ______ ribonucleico;
salicylic ______ salicílico;
sulfonic ______ sulfónico;
sulfuric ______ sulfúrico;
uric ______ úrico.

acid

adj & n ácido; fatty —ácido graso (V. también fatty acid); gastric o stomach —ácido gástrico or del estómago
References in classic literature ?
The walk revived her spirits, and flattering herself that she had made good bargins, she trudged home again, after buying a very young lobster, some very old asparagus, and two boxes of acid strawberries.
Bubbles of carbonic acid gas will rise to the surface and burst, and make rings two or three feet wide.
The sensation was like being touched in the marrow with some pungent and searching acid, it set my very teeth on edge.
Should you be so rigid in adhering to monastic rule,'' he added, ``as to prefer your acid preparation of milk, I hope you will not strain courtesy to do me reason.
It makes your eyes sore--at least the acid gets into Sir Charles's, and the difference between the first and second states is nothing but imagination, except that the last state is worse than the--here's luncheon
I don't know what it was, but it had either prussic acid or white lead in it.
It was not unpleasant to the taste, though slightly acid, and I learned in a short time to prize it very highly.
His every move was reported to the big Bwana--just what animals he killed and how many of each species, how he killed them, too, for Bwana would not permit the use of prussic acid or strychnine; and how he treated his "boys.
Indeed, each man consumes, in one hour, the oxygen contained in more than 176 pints of air, and this air, charged (as then) with a nearly equal quantity of carbonic acid, becomes unbreathable.
There was blood, I saw, in the sink,--brown, and some scarlet--and I smelt the peculiar smell of carbolic acid.
It restores the blue color of litmus-paper reddened by an acid, and it turns syrup of violets green.
Donnithorne, the delicately clean, finely scented, withered old man, led out Miss Irwine, with his air of punctilious, acid politeness; Mr.