# acid
## English
### Etymology

From French acide, from Latin acidus (“sour, acid”), from aceō (“I am sour”). Doublet of agita and acetic.

### Pronunciation

* (Received Pronunciation, General American) enPR: ăs'ĭd, IPA: /ˈæsɪd/
* Audio (General American):(file)
* Rhymes: -æsɪd

### Adjective

acid (comparative acider, superlative acidest)
* Sour, sharp, or biting to the taste; tart; having the taste of vinegar.
    acid fruits or liquors
* (figuratively) Sour-tempered.
    His response was harsh and acid.
** 1864, Anthony Trollope, The Small House at Allington, 2nd edition, volume 2, Smith, Elder & Co., page 235:His voice was as stern and his face as acid as ever.
** 1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC:It must be admitted that Challenger is provocative in the last degree, but Summerlee has an acid tongue, which makes matters worse.
** 1914 November, Louis Joseph Vance, “An Outsider […]”, in Munsey’s Magazine, volume LIII, number II, New York, N.Y.: The Frank A[ndrew] Munsey Company, […], published 1915, →OCLC, chapter I (Anarchy), page 373, column 2:Little disappointed, then, she turned attention to "Chat of the Social World," gossip which exercised potent fascination upon the girl's intelligence. She devoured with more avidity than she had her food those pretentiously phrased chronicles of the snobocracy—[…]—distilling therefrom an acid envy that robbed her napoleon of all its flavor.
* Of or pertaining to an acid; acidic.
    acid soils
** 1975, Peter N. Barber, Cecil Ernest Lucas Phillips, The Trees Around Us, page 101:Like other nyssas, it is in nature a creature of swampy places and looks loveliest where massed close to water and reflected in it, but justifies itself elsewhere if the soil is moist and acid, succeeding in wet clay.
* (music) Denoting a musical genre that is a distortion (as if hallucinogenic) of an existing genre, as in acid house, acid jazz, acid rock.

#### Quotations

* For quotations using this term, see Citations:acid.

#### Synonyms

* acidic

#### Antonyms

* alkaline
* base

#### Derived terms

* 10-undecenoic acid
* 1, 6-Cleves acid
* 1, 7-Cleves acid
* 2-methyl-2-propenoic acid
* aberic acid
* abietic acid
* abscisic acid
* acacic acid
* acanthoic acid
* aceburic acid
* aceconitic acid
* aceneuramic acid
* acetacetic acid
* acetamidohexanoic acid
* acetoacetic acid
* acetohydroxamic acid
* acetohydroxy acid
* acetolactic acid
* acetonedicarboxylic acid
* acetous acid
* acetrizoic acid
* aceturic acid
* acetylenecarboxylic acid
* acetylglutamic acid
* acetylmuramic acid
* acetylneuraminic acid
* acetyltannic acid
* acexamic acid
* achilleic acid
* acidaemia
* acid amide
* acid anhydride
* acid attack
* acid-base
* acid-base pair
* acid bomb
* acid breaks
* acid chloride
* acidcore
* acid dissociation constant
* acid drop
* acidemia
* acidergic
* acid-fastness
* acid-free
* acid house
* acidimetre
* acidimetric
* acidimetry
* acid indigestion
* acidise
* acidization
* acidize
* acid jazz
* acidless
* acid lime
* acid mordant
* acidness
* acid number
* acidocyte
* acidogenesis
* acidogenic
* acidoid
* acidolysis
* acidometer
* acidophil
* acidophilia
* acidophyte
* acidopore
* acidotropic
* acid reflux
* acid rock
* acid snow
* acid-stable
* acid-tongued
* aciduria
* acid value
* acid-wash
* acid-washable
* acid weed
* acidy
* acitretin
* aconic acid
* aconitic acid
* actinidic acid
* adamantanoic acid
* adenylic acid
* adenylosuccinic acid
* adrenic acid
* aesculic acid
* agaricic acid
* agaricinic acid
* aldaric acid
* aldehydic acid
* aldobiuronic acid
* aldoheptonic acid
* aldohexonic acid
* aldohexuronic acid
* aldonic acid
* aldopentonic acid
* aldotetronic acid
* aldotrionic acid
* aldouronic acid
* alectoronic acid
* alendronic acid
* alien nucleic acid
* alkalonic acid
* alkanesulfonic acid
* alkanoic acid
* alkynoic acid
* allantoic acid
* allanturic acid
* allaric acid
* allenoic acid
* allomucic acid
* allonic acid
* allophanic acid
* alloxanic acid
* all-trans retinoic acid
* alpha acid
* alpha-amino acid
* alpha linolenic acid
* altraric acid
* altronic acid
* aluminic acid
* ambreic acid
* amfonelic acid
* amic acid
* amidopropionic acid
* amidotrizoic acid
* aminoacetic acid
* aminoadipic acid
* aminobenzoic acid
* aminobutanoic acid
* aminobutyric acid
* aminocaproic acid
* aminocyclopropanecarboxylic acid
* aminohexanoic acid
* aminohydroxamic acid
* aminoisobutyric acid
* aminolaevulinic acid
* aminolevulinic acid
* aminomethylbenzoic acid
* aminomethylphosphonic acid
* aminooxyacetic acid
* aminopenicillanic acid
* aminophosphinic acid
* aminophosphonic acid
* aminopolycarboxylic acid
* aminosalicylic acid
* aminoshikimic acid
* amygdalic acid
* anacardic acid
* anemonic acid
* angelic acid
* angelicic acid
* anilic acid
* anilinobenzoic acid
* anisic acid
* anofinic acid
* antacid
* anthranilic acid
* antiacid
* antimonic acid
* anwuweizonic acid
* apic acid
* apiolic acid
* arabinoic acid
* arabinonucleic acid
* argininosuccinic acid
* arginosuccinic acid
* aristolochic acid
* arjunolic acid
* arogenic acid
* arsanilic acid
* arsenious acid
* arsinic acid
* arsinous acid
* arsonic acid
* arsonous acid
* artelinic acid
* artemisinic acid
* asparaginic acid
* asparagusic acid
* aspergillic acid
* aureolic acid
* auric acid
* aurintricarboxylic acid
* azelaic acid
* azidobenzoic acid
* azidoformic acid
* azinic acid
* azodicarboxylic acid
* azoleic acid
* azonic acid
* Badische acid
* barbatic acid
* barbituric acid
* bartogenic acid
* battery acid
* behenic acid
* bempedoic acid
* bendazolic acid
* benzenearsonous acid
* benzenedicarboxylic acid
* benzenesulfonic acid
* benzhydroxamic acid
* benzilic acid
* benzohydroxamic acid
* benzotriazolic acid
* beta-amino acid
* betalamic acid
* betulinamaric acid
* betulinic acid
* betulonic acid
* biacid
* bichloroacetic acid
* bicinchoninic acid
* biphosphoglyceric acid
* bisamino acid
* bishydroxamic acid
* blotter acid
* boletic acid
* bombic acid
* bombycic acid
* bongkrek acid
* bongkrekic acid
* boninic acid
* boracic acid
* borinic acid
* boroamino acid
* borofluoric acid
* boronic acid
* boswellic acid
* botcinic acid
* bovinic acid
* brassic acid
* brassidic acid
* bridged nucleic acid
* Broenner's acid
* bromoacetic acid
* bromobenzenesulfonic acid
* bromobenzenesulphonic acid
* bromopyruvic acid
* bromous acid
* Bronner's acid
* Brönner's acid
* Bronsted acid
* Bronsted-Lowry acid
* Brønsted-Lowry acid
* butadienoic acid
* butanedicarboxylic acid
* butanedioic acid
* butanoic acid
* butenoic acid
* butylboronic acid
* byssochlamic acid
* cacodylic acid
* caffeic acid
* caffeoylquinic acid
* caffetannic acid
* caftaric acid
* cahincic acid
* calcitroic acid
* calendic acid
* camphocarboxylic acid
* campholic acid
* camphoric acid
* camphoronic acid
* camphorsulfonic acid
* camphorsulphonic acid
* camphretic acid
* cannabichromenic acid
* cannabichromevarinic acid
* cannabicyclolic acid
* cannabidiolic acid
* cannabielsoic acid
* cannabigerolic acid
* cannabigerovarinic acid
* cannabinerolic acid
* cannabinolic acid
* canrenoic acid
* capronic acid
* carballylic acid
* carbanilic acid
* carbazic acid
* carbazotic acid
* carbonic acid gas
* carboxyglutamic acid
* carglumic acid
* carminic acid
* carnaubic acid
* carnic acid
* carnosic acid
* Caro's acid
* carotenoic acid
* carthamic acid
* casamino acid
* catalpic acid
* catechutannic acid
* cellobionic acid
* cellotrionic acid
* cephalosporanic acid
* cerebric acid
* cerebronic acid
* ceroplastic acid
* cerotinic acid
* cervonic acid
* cetic acid
* cetoleic acid
* cetraric acid
* cevadic acid
* cevitamic acid
* chaetomellic acid
* chalybaeizanic acid
* chaulmoogric acid
* chebulagic acid
* chebulic acid
* chebulinic acid
* chelidamic acid
* chelidonic acid
* chenodeoxycholic acid
* chenodeoxyglycocholic acid
* chenodesoxycholic acid
* chicoric acid
* chinic acid
* chiodectonic acid
* chlodronic acid
* chloranilic acid
* chloroacetic acid
* chloroauric acid
* chloroazotic acid
* chlorocarbonic acid
* chloroethanoic acid
* chloroformic acid
* chlorogenic acid
* chlorokojic acid
* chloromercuribenzoic acid
* chloroplatinic acid
* chlorosulfonic acid
* chlorosulfuric acid
* chlorous acid
* cholaic acid
* cholanoic acid
* choleic acid
* cholinic acid
* chorismic acid
* chrome-sulfuric acid
* chromotropic acid
* chrysanthemic acid
* chrysanthemumdicarboxylic acid
* chrysanthemum-dicarboxylic acid
* chrysophanic acid
* chyazic acid
* cichoric acid
* cicloxilic acid
* cimicic acid
* cinchomeronic acid
* cinchonic acid
* cinchotannic acid
* cinnamic acid
* citraconic acid
* citramalic acid
* citric acid cycle
* citronellic acid
* clavaric acid
* clavulanic acid
* clodronic acid
* clofibric acid
* clupanodonic acid
* cobalticyanic acid
* cobinic acid
* coccinic acid
* cochinelic acid
* colanic acid
* columbic acid
* columbinic acid
* comenic acid
* complicatic acid
* confluentic acid
* conidendric acid
* conjugate acid-base pair
* conpsoromic acid
* consquamatic acid
* copaibic acid
* copaivic acid
* coprocholic acid
* cornic acid
* coronafacic acid
* coronamic acid
* corosolic acid
* corynemycolic acid
* corynomycolic acid
* coumaric acid
* coumarilic acid
* coumarinic acid
* coutaric acid
* creatine-phosphoric acid
* creatinephosphoric acid
* crenic acid
* crepenynic acid
* cresylic acid
* croconic acid
* cromoglicic acid
* cryptochlorogenic acid
* cryptochlorophaeic acid
* cryptoporic acid
* cubebic acid
* cumic acid
* cyanoacetic acid
* cyanoacrylic acid
* cyanocarbon acid
* cyanoformic acid
* cycloalkanecarboxylic acid
* cyclobutaneacetic acid
* cyclohexanoic acid
* cyclopentanoic acid
* cyclopiazonic acid
* cyclopropanecarboxylic acid
* cylindrospermic acid
* cymarylic acid
* cypionic acid
* cysteic acid
* cytidylic acid
* dafachronic acid
* Dahl's acid
* daturic acid
* decadienoic acid
* decanedioic acid
* decanoic acid
* decarboxysquamatic acid
* decarboxythamnolic acid
* decatoic acid
* decenoic acid
* decoic acid
* deduced amino acid sequence
* dehydroacetic acid
* dehydroamino acid
* dehydrocholic acid
* dehydroquinic acid
* dehydroshikimic acid
* delphinic acid
* delta acid
* deltic acid
* deoxyadenylic acid
* deoxycholic acid
* deoxycytidylic acid
* deoxygluconic acid
* deoxyribose nucleic acid
* deoxyuridylic acid
* desoxyribonucleic acid
* desoxyribose nucleic acid
* dextronic acid
* dextrotartaric acid
* diacetic acid
* diacid
* dialuric acid
* diaminopimelic acid
* diatrizoic acid
* diazoacetic acid
* diazoic acid
* dicarboxylic acid
* dichloroacetic acid
* dichlorophenoxyacetic acid
* dichromic acid
* dienoic acid
* diethylenetriaminepentaacetic acid
* diffractaic acid
* diglycolic acid
* dihomolinoleic acid
* dihydroartemisinic acid
* dihydrokainic acid
* dihydrolipoic acid
* dihydroxybenzoic acid
* dihydroxyoctadecanoic acid
* dihydroxysuccinic acid
* diiodosalicylic acid
* diketo acid
* dimercaptosuccinic acid
* dimethylarsinic acid
* dioic acid
* diphosphoric acid
* dipicolinic acid
* diploschistesic acid
* disulphuric acid
* dithioacetic acid
* dithiobenzoic acid
* dithiocarbamic acid
* dithionic acid
* dithionitrobenzoic acid
* dithionous acid
* divaricatic acid
* djenkolic acid
* docosadienoic acid
* docosahexaenoic acid
* docosanoic acid
* docosapentaenoic acid
* docosatetraenoic acid
* docosenoic acid
* dodecanedioic acid
* dodecanoic acid
* dodecenoic acid
* doeglic acid
* doisynolic acid
* dolichoic acid
* domoic acid
* dotriacontanoic acid
* Dressel acid
* drop acid
* durylic acid
* ecdysonoic acid
* edetic acid
* egtazic acid
* eicosadienoic acid
* eicosaenoic acid
* eicosanoic acid
* eicosapentaenoic acid
* eicosapentanoic acid
* eicosatetraenoic acid
* eicosatetraynoic acid
* eicosatrienoic acid
* eicosenoic acid
* elaeomargaric acid
* elaidic acid
* elaïdic acid
* elaidinic acid
* elaiodic acid
* eleomargaric acid
* eleostearic acid
* ellagic acid
* elmiric acid
* embonic acid
* emulsic acid
* enamino acid
* enanthic acid
* enedioic acid
* enoic acid
* epibetulinic acid
* epoxyeicosapentaenoic acid
* epoxyeicosatrienoic acid
* equisetic acid
* erythorbic acid
* erythraric acid
* erythroleic acid
* erythronic acid
* esculic acid
* essential amino acid
* essential fatty acid
* etabonic acid
* etacrynic acid
* ethacrynic acid
* ethanedisulfonic acid
* ethanesulfonic acid
* ethionic acid
* ethylenediaminetetraacetic acid
* ethylenediaminetetracetic acid
* ethylsulphuric acid
* etianic acid
* etidronic acid
* euchroic acid
* eudesmic acid
* euscaphic acid
* euxanthic acid
* evernic acid
* exocarpic acid
* farnesoic acid
* fenamic acid
* fenclozic acid
* fenofibric acid
* ferric acid
* ferrocyanic acid
* fertaric acid
* ferulic acid
* filicic acid
* flufenamic acid
* fluoboric acid
* fluoro acid air
* fluoroantimonic acid
* fluoroboric acid
* fluoroorotic acid
* fluorosilicic acid
* folic acid
* folinic acid
* formiminoglutamic acid
* frangulic acid
* frangulinic acid
* free fatty acid
* fulminuric acid
* fulvic acid
* fuming sulfuric acid
* fuming sulphuric acid
* furilic acid
* furoic acid
* fusaric acid
* gadic acid
* gadobenic acid
* gadoleic acid
* gadopentetic acid
* gadoteric acid
* gadoxetic acid
* gaidic acid
* galactaric acid
* galactonic acid
* galacturonic acid
* gallagic acid
* gallic acid
* gallotannic acid
* gambodic acid
* gambogenic acid
* gambogic acid
* gamma-aminobutyric acid
* gamma-hydroxybutyric acid
* gamolenic acid
* ganoderic acid
* garcinoic acid
* gastric acid
* geddic acid
* geic acid
* gelsemic acid
* gelseminic acid
* geniposidic acid
* gentianic acid
* gentisic acid
* geranic acid
* germanic acid
* gheddic acid
* glacial acetic acid
* glacial acid
* glaucic acid
* glomelliferic acid
* glucaric acid
* glucoascorbic acid
* glucocaffeic acid
* glucoheptanoic acid
* glucoheptonic acid
* glucopyranuronic acid
* glucosaminic acid
* glucosiduronic acid
* glucosinolic acid
* glucuronic acid
* glutaconic acid
* glutaric acid
* glycaric acid
* glycerophosphoric acid
* glycinohydroxamic acid
* glyco-amino-acid
* glycochenodeoxycholic acid
* glycocholic acid
* glycodeoxycholic acid
* glycollic acid
* glycol nucleic acid
* glyconic acid
* glycosidic acid
* glycosinolic acid
* glycosyl-amino-acid
* glycuronic acid
* glycyrrhetinic acid
* glycyrrhizic acid
* glycyrrhizinic acid
* glyoxalic acid
* glyoxylic acid
* gondoic acid
* gorlic acid
* graphitic acid
* guanidinosuccinic acid
* guanylic acid
* gularic acid
* guluronic acid
* gymnemic acid
* gyrophoric acid
* haemathamnolic acid
* haloacetic acid
* haloacid
* haloboronic acid
* hederic acid
* helvellic acid
* helvolic acid
* hemicarbonic acid
* heneicosanoic acid
* heneicosapentaenoic acid
* hennotannic acid
* hentriacontanoic acid
* heptacosanoic acid
* heptadecanoic acid
* heptadecatrienoic acid
* heptadecenoic acid
* heptafluorobutyric acid
* heptanoic acid
* heptatriacontanoic acid
* heptelidic acid
* heptenoic acid
* heptoic acid
* heptynoic acid
* heteropoly acid
* hexacarboxylic acid
* hexachloroplatinic acid
* hexacid
* hexacosanoic acid
* hexacosenoic acid
* hexadecanedioic acid
* hexadecanoic acid
* hexadecatrienoic acid
* hexadecenoic acid
* hexaenoic acid
* hexafluorophosphoric acid
* hexahydroxydiphenic acid
* hexanoic acid
* hexatetracontanoic acid
* hexatriacontanoic acid
* hexenoic acid
* hexuronic acid
* hexynoic acid
* hiascic acid
* hipposudoric acid
* hippuric acid
* hircic acid
* hirsutic acid
* homoaconitic acid
* homocitric acid
* homogentisic acid
* homopantothenic acid
* homopolygalacturonic acid
* homosekikaic acid
* homovanillic acid
* homoveratric acid
* hopantenic acid
* hordeic acid
* hyaluronic acid
* hydantoic acid
* hydnocarpic acid
* hydracid
* hydracrylic acid
* hydrazinecarboxylic acid
* hydrazoic acid
* hydrazonic acid
* hydrazonoic acid
* hydric acid
* hydrocinnamic acid
* hydroferrocyanic acid
* hydrofluosilicic acid
* hydrogen acid
* hydrohalic acid
* hydrohydroxic acid
* hydroiodic acid
* hydromellonic acid
* hydroperoxyeicosatetraenoic acid
* hydrosorbic acid
* hydrosulfuric acid
* hydrosulfurous acid
* hydrosulphuric acid
* hydroxamic acid
* hydroxic acid
* hydroxilic acid
* hydroximic acid
* hydroxyacetic acid
* hydroxybenzoic acid
* hydroxybutyric acid
* hydroxycinnamic acid
* hydroxycitric acid
* hydroxyeicosatetraenoic acid
* hydroxyglutaric acid
* hydroxyisovaleric acid
* hydroxylic acid
* hydroxymyristic acid
* hydroxypyruvic acid
* hydroxystearic acid
* hyperacid
* hypoacid
* hypoconstictic acid
* hypogaeic acid
* hypogeic acid
* hyponitric acid
* hyponitrous acid
* hypophosphoric acid
* hypoprotocetraric acid
* hyposulfurous acid
* hypothamnolic acid
* ibandronic acid
* ibotenic acid
* icosapentaenoic acid
* idonic acid
* iduronic acid
* ilicic acid
* imidic acid
* imido acid
* iminoacetic acid
* imino acid
* iminoaspartic acid
* iminodiacetic acid
* incadronic acid
* indigotic acid
* inosinic acid
* iobenzamic acid
* iocarmic acid
* iocetamic acid
* iodic acid
* iodoacetic acid
* iodobehenic acid
* iodous acid
* iodoxamic acid
* iodoxybenzoic acid
* ioglicic acid
* ioglycamic acid
* iopanoic acid
* iopodic acid
* iotalamic acid
* iotroxic acid
* ioxaglic acid
* ioxitalamic acid
* ioxithalamic acid
* ipecacuanhic acid
* isatic acid
* isatinic acid
* isatropic acid
* isethionic acid
* isoacid
* isoascorbic acid
* isobutylphenyl propionic acid
* isocaproic acid
* isochlorogenic acid
* isocitric acid
* isocyanic acid
* isocyanuric acid
* isoferulic acid
* isolithocholic acid
* isonicotinic acid
* isononanoic acid
* isopalmitic acid
* isophthalic acid
* isopimaric acid
* isopoly acid
* isopropylmalic acid
* isopropylmethylphosphonic acid
* isorumelenic acid
* isosaccharinic acid
* isostearic acid
* isosulphocyanic acid
* isouric acid
* isovaleric acid
* isovanillic acid
* isoxerocomic acid
* itaconic acid
* itamalic acid
* itatartaric acid
* jacaric acid
* jalapic acid
* jalapinolic acid
* jasmonic acid
* juniperic acid
* kacemic acid
* kainic acid
* kaurenoic acid
* kermesic acid
* keto acid
* ketoacid
* ketoadipic acid
* ketoaldonic acid
* ketocarboxylic acid
* ketoglutaric acid
* ketoisovaleric acid
* keto-mycolic acid
* ketomycolic acid
* ketopantoic acid
* ketosuccinic acid
* kinic acid
* kinotannic acid
* kinovic acid
* kojic acid
* komenic acid
* koningic acid
* kulonic acid
* kynurenic acid
* labiatic acid
* lacceroic acid
* laccic acid
* lactamic acid
* lactobacillic acid
* lactobionic acid
* lactucic acid
* lacturamic acid
* laevulinic acid
* lampic acid
* lantanuric acid
* larixinic acid
* Laurent's acid
* lead-acid
* lecanoric acid
* legionaminic acid
* lepidotic acid
* lesquerolic acid
* leucic acid
* leucinic acid
* leuconic acid
* leucoturic acid
* levofolinic acid
* levomefolic acid
* levulinic acid
* lichenic acid
* lichesterinic acid
* lignoceric acid
* limonoic acid
* linoelaidic acid
* lipoamino acid
* lipoic acid
* lipoteichoic acid
* lithic acid
* lithobilic acid
* lithocholic acid
* lithofellic acid
* lithospermic acid
* lobaric acid
* locked nucleic acid
* loganic acid
* lucidenic acid
* lupulinic acid
* luteic acid
* lycopenoic acid
* lysergic acid amide
* lysophosphatidic acid
* lyxonic acid
* madecassic acid
* magic acid
* mahogany acid
* maizenic acid
* malamic acid
* maleamic acid
* maleylacetoacetic acid
* malonamic acid
* maltonic acid
* malvalic acid
* mandelic acid
* manganic acid
* mannaric acid
* mannonic acid
* mannosaminuronic acid
* mannuronic acid
* manwuweizic acid
* margaritic acid
* marine acid
* marine acid air
* maslinic acid
* mebutic acid
* meclofenamic acid
* meconic acid
* meconinic acid
* medronic acid
* mefenamic acid
* melanurenic acid
* melanuric acid
* melassic acid
* melibionic acid
* melilotic acid
* melissic acid
* mellic acid
* mellitic acid
* menegazziaic acid
* menispermic acid
* mephenamic acid
* mephitic acid
* mercaptoacetic acid
* mercaptobenzoic acid
* mercaptocarboxylic acid
* mercaptopropionic acid
* mercaptoundecanoic acid
* mercapturic acid
* merochlorophaeic acid
* meromycolic acid
* merulinic acid
* mesaconic acid
* mesembryanthemoidigenic acid
* mesotartaric acid
* mesoxalic acid
* metaboric acid
* metachloroperoxybenzoic acid
* metagallic acid
* metapectic acid
* metasaccharinic acid
* metasilicic acid
* metastannic acid
* metatartaric acid
* metatitanic acid
* metatungstic acid
* metavanadic acid
* methanesulfonic acid
* methanesulphonic acid
* methanoic acid
* methionic acid
* methoxymalonic acid
* methoxymycolic acid
* methylarsonic acid
* methylarsonous acid
* methylchlorophenoxypropionic acid
* methylglutaconic acid
* methylglutaric acid
* methylmalonic acid
* methylnorhomosekikaic acid
* methylstictic acid
* metrizoic acid
* mevaldic acid
* mevalonic acid
* microphyllinic acid
* microribonucleic acid
* milk acid
* mimotannic acid
* mineral acid
* minodronic acid
* miriquidic acid
* molybdic acid
* monacid
* monoacid
* monomethylarsonic acid
* monomethylarsonous acid
* monothionic acid
* montanic acid
* moric acid
* moringic acid
* morintannic acid
* moritannic acid
* moroctic acid
* moronic acid
* moroxylic acid
* morrhuic acid
* muconic acid
* mucous acid
* muramic acid
* muricholic acid
* mycocerosic acid
* mycolic acid
* mycolipanoic acid
* mycolipanolic acid
* mycolipenic acid
* mycomelic acid
* naphthenic acid
* naphthionic acid
* nebraskanic acid
* niacin
* nicotinohydroxamic acid
* nonacid
* Nordhausen acid
* nordivaricatic acid
* obeticholic acid
* olivetoric acid
* orthoacid
* overacid
* oxoacid
* oxyacid
* parietinic acid
* penicillanic acid
* penicillinic acid
* pentacid
* peracid
* peroxyacid
* peroxytrifluoroacetic acid
* phenoxyacid
* phosphotungstovanadic acid
* photoacid
* picrolichenic acid
* pinastric acid
* polyacid
* porphyrilic acid
* propionohydroxamic acid
* psyllic acid
* purreic acid
* pyroacid
* pyrotritaric acid
* pythocholic acid
* red fuming nitric acid
* rhodeoretinic acid
* ruberythric acid
* salicylhydroxamic acid
* scammonic acid
* semiacid
* skacid
* stipitatic acid
* stomach acid
* strychnic acid
* subacid
* sulfacid
* sulfoacid
* sulphoacid
* superacid
* talonic acid
* telfairic acid
* tetraacid
* tetracid
* thermoacidophile
* thioacid
* thionitrobenzoic acid
* thiophanic acid
* Tobias acid
* triacid
* trichloroisocyanuric acid
* trifluoroethaneperoxoic acid
* trifluoroperacetic acid
* trihydroxybenzoic acid
* truxillic acid
* uroxanic acid
* uvic acid
* variolaric acid
* vegetable acid
* white fuming nitric acid
* wood acid
* xenyhexenic acid
* zaragozic acid

#### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

### Noun

acid (countable and uncountable, plural acids)
* A sour substance.
* (chemistry)
** Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid.
*** 2015 August 18, Clelia De-la-Peña et al., “The role of chromatin modifications in somatic embryogenesis in plants”, in Frontiers in Plant Science‎, volume 6, →DOI:SE onset depends on a complex network of interactions among plant growth regulators, mainly auxins and cytokinins, during the proembryogenic early stages, and ethylene and gibberellic and abscisic acids later in the development of somatic embryos.
** Any compound that easily donates protons to a base; a Brønsted acid.
** Any compound that can accept a pair of electrons to form a covalent bond; a Lewis acid.
* Any corrosive substance.
** 2006, James Fenton, Jerusalem:You are in error. / This is terror. / This is your banishment. This land is mine. / This is what you earn. / This is the Law of No Return. / This is the sour dough, this the sweet wine. / This is my history, this my race / And this unhappy man threw acid in my face.
* (uncountable, slang) LSD, lysergic acid diethylamide.
** 1967, Joe David Brown, editor, The Hippies, New York: Time, Inc, page 171:In the end, though, there is one sure way to distinguish a real hippie from his assorted sympathizers: hippies drop acid. That is, real hippies frequently, if irregularly, ingest LSD.

#### Antonyms

* alkali
* base

#### Hyponyms

* See also Thesaurus:acid

#### Derived terms

* acid-base equilibrium
* acid-base indicator
* acid-fast
* acidhead
* acid house
* acidic
* acidify
* acidimeter
* acidity
* acid jazz
* acidly
* acidophile
* acidophilic
* acidosis
* acid-proof, acidproof
* acid rain
* acid-resistant
* acid test
* acidulate
* acidulous
* come the acid
* come the old acid
* acetic acid
* acetylsalicylic acid
* acid of air
* acid of amber
* acid of ants
* acid of apples
* acid of lemon
* acid of milk
* acid of salt
* acid of sugar
* acrylic acid
* adipic acid
* alginic acid
* alpha-hydroxy acid
* amino acid
* arachidic acid
* arachidonic acid
* arsenic acid
* ascorbic acid
* aspartic acid
* benzoic acid
* bile acid
* boric acid
* bromic acid
* butyric acid
* capric acid
* caproic acid
* caprylic acid
* carbamic acid
* carbolic acid, phenol
* carbonic acid
* carboxylic acid
* cerotic acid
* chloric acid
* cholic acid
* chromic acid
* citric acid
* conjugate acid
* connorstictic acid
* consalazinic acid
* constictic acid
* convirensic acid
* crotonic acid
* cryptostictic acid
* cyanic acid
* cyanuric acid
* cyclamic acid
* deoxyribonucleic acid, DNA
* erucic acid
* ethanoic acid
* fatty acid
* folic acid
* formic acid
* fulminic acid
* fumaric acid
* fumarprotocetraric acid
* fusidic acid
* galbinic acid
* gibberellic acid
* gluconic acid
* glutamic acid
* glyceric acid
* glycolic acid
* humic acid
* hydriodic acid
* hydrobromic acid
* hydrochloric acid
* hydrocyanic acid
* hydrofluoric acid
* hydrosulphurous acid
* hydroxy acid
* hypobromous acid
* hypochlorous acid
* hypofluorous acid
* hypohalous acid
* hypoiodous acid
* hypophosphorous acid
* hyposalazinic acid
* hyposulphurous acid
* indoleacetic acid
* isobutyric acid
* ketipic acid
* lactic acid
* lauric acid
* Lewis acid
* linoleic acid
* linolenic acid
* lysergic acid
* maleic acid
* malic acid
* malonic acid
* margaric acid
* metaphosphoric acid
* methacrylic acid
* mucic acid
* muriatic acid
* myristic acid
* nicotinic acid
* nitric acid
* nitrous acid
* norisonotatic acid
* norstictic acid
* nucleic acid
* oleic acid
* omega-3 fatty acid
* omega-6 fatty acid
* osmic acid
* oxalic acid
* oxaloacetic acid
* palmitic acid
* pantothenic acid
* pectic acid
* pelargonic acid
* perchloric acid
* periodic acid
* permanganic acid
* petroselinic acid
* phosphoric acid
* phosphorous acid
* phthalic acid
* picric acid
* propanoic acid
* propionic acid
* protocetraric acid
* prussic acid
* pyrogallic acid
* pyrophosphoric acid
* pyruvic acid
* racemic acid
* retinoic acid
* ribonucleic acid, RNA
* ricinoleic acid
* salazinic acid
* salicylic acid
* sebacic acid
* selenic acid
* silicic acid
* stearic acid
* stictic acid
* suberic acid
* succinic acid
* sulphonic acid, sulfonic acid
* sulphuric acid, sulfuric acid
* sulphurous acid, sulfurous acid
* tannic acid
* tantalic acid
* tartaric acid
* telluric acid
* thiocyanic acid
* thiosulphuric acid, thiosulfuric acid
* titanic acid
* toluic acid
* trans fatty acid
* tungstic acid
* undecylenic acid
* uric acid
* usnic acid
* valeric acid
* vanadic acid
* virensic acid

#### Descendants

* → Welsh: asid

#### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

### See also

* acerbic
* acro-
* pH

### References

* “acid”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

### Anagrams

* -adic, Daic, adic, cadi, caid

## Albanian
### Noun

acid m (plural acide, definite acidi, definite plural acidet)
* (chemistry) acid
    Synonym: thartor

#### Declension
### Further reading

* FGJSSH: Fjalor i gjuhës së sotme shqipe [Dictionary of the modern Albanian language]‎, 1980
* “acid”, in FGJSH: Fjalor i gjuhës shqipe [Dictionary of the Albanian language] (in Albanian), 2006

## Dutch
### Etymology

Unadapted borrowing from English acid.
Attested since at least 1970.

### Pronunciation

* Audio:(file)

### Noun

acid m (uncountable)
* (slang) LSD, lysergic acid diethylamide
    Synonym: LSD
* (music) acid

## Romanian
### Etymology

Borrowed from French acide, from Latin acidus (“sour, acid”).

### Pronunciation

* IPA: [aˈt͡ʃid]

### Adjective

acid m or n (feminine singular acidă, masculine plural acizi, feminine and neuter plural acide)
* acid, acidic

#### Related terms

* aciditate

### Noun

acid m (plural acizi)
* acid

#### Derived terms

* acid dezoxiribonucleic

### Further reading

* acid in DEX online—Dicționare ale limbii române (Dictionaries of the Romanian language)

## Spanish
### Adjective

acid (invariable)
* (music) acid

### Noun

acid m (uncountable)
* (music) acid

### Further reading

* “acid”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 2024 December 10