English > acid: 5 senses > noun 1, substance| Meaning | 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. |
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| Narrower | alkapton, alcapton, homogentisic acid | An acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine |
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| aminobenzoic acid | A derivative of benzoic acid |
| aqua regia, nitrohydrochloric acid | A yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold) |
| arsenic acid | An acid formed from arsenic pentoxide |
| barbituric acid, malonylurea | A white crystalline acid derived from pyrimidine |
| boric acid, boracic 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 |
| 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, phenol, hydroxybenzene, oxybenzene, phenylic acid | A toxic white soluble crystalline acidic derivative of benzene |
| carbonic acid | A weak acid known only in solution |
| carboxylic acid | An organic acid characterized by one or more carboxyl groups |
| 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 |
| 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) |
| cyanamide, cyanamid | 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 |
| dibasic acid | An acid containing two replaceable hydrogen atoms per molecule |
| dichromic acid | The hypothetical acid (H2Cr2O7) from which dichromates are derived |
| 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 |
| formic acid | A colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam |
| fulminic acid | (CNOH) an unstable acid occurring mainly in the form of explosive salts and esters that is isomeric with cyanic acid |
| fumaric acid | A colorless crystalline acid with a fruity taste |
| gallic acid | A colorless crystalline acid obtained from tannin |
| gamma acid | A crystalline acid used to make azo dyes |
| glyceric acid | A syrupy acid obtained by oxidation of glycerol or glyceraldehyde |
| glycolic acid, glycollic acid, hydroxyacetic acid | A translucent crystalline compound found in sugar ... / sugar cane and sugar beets and unripe grapes |
| hydriodic acid | (HI) a colorless or yellow aqueous solution of hydrogen iodide |
| hydrobromic acid | An aqueous solution of hydrogen bromide that is a strong liquid acid |
| hydrochloric acid, chlorohydric acid | An aqueous solution of hydrogen chloride |
| hydrocyanic acid, prussic acid | A solution of hydrogen cyanide in water |
| hydrofluoric acid | A weak poisonous liquid acid |
| hydrogen chloride | A colorless corrosive gas (HCl) |
| hydroiodic acid | An acid formed by aqueous solution of hydrogen iodide |
| hydroxy acid | Any acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself |
| hypochlorous acid | A weak unstable acid known only in solution and in its salts |
| hyponitrous acid | An explosive white crystalline weak acid (H2N2O2) |
| iodic acid | A soluble crystalline acid |
| isocyanic acid | An acid known only in the form of its esters |
| itaconic acid | A crystalline carboxylic acid |
| lansoprazole, Prevacid | antacid (trade name Prevacid) that suppresses acid secretion in the stomach |
| lysergic acid | A crystalline acid often used in medical research |
| maleic acid | A colorless crystalline compound found in unripe fruit (such as apples or tomatoes or cherries) and used mainly to make polyester resins |
| manganic acid | A dibasic acid (H2MnO4) found only in solution and in manganate salts |
| methacrylic acid, 2-methylpropenoic acid | An unsaturated acid (C4H6O2) used to make resins and plastics |
| monobasic acid | An acid containing only one replaceable hydrogen atom per molecule |
| nitric acid, aqua fortis | 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 |
| oxalacetic acid, oxaloacetic acid | An acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates) |
| oxalic acid, ethanedioic acid | A toxic colorless crystalline organic acid found in oxalis and other plants |
| oxyacid, oxygen acid | Any acid that contains oxygen |
| pantothenic acid, pantothen | A vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids |
| para aminobenzoic acid, PABA | A metabolic acid found in yeast and liver cells |
| pectic acid | A complex acid that occurs in ripe fruit and some vegetables |
| perchloric acid | A powerful oxidizing agent |
| permanganic acid | An unstable purple acid (HMnO4) known only in solution or of permanganate salts |
| phthalic acid | A colorless acid used to make dyes and perfumes |
| picric acid | A yellow toxic highly explosive strong acid |
| pyruvic acid | A colorless acid formed as an important intermediate in metabolism or fermentation |
| selenic acid | A strong acid (H2SeO4) analogous to sulfuric acid |
| silicic acid | A jellylike substance (hydrated silica) |
| sulfanilic acid, sulphanilic acid | A crystalline acid made from aniline and used as a dye |
| sulfonic acid, sulphonic acid | An acid derived from sulphuric acid |
| tetrabasic acid | An acid containing four replaceable hydrogen atoms per molecule |
| thiocyanic acid | An unstable acid that can be obtained by distilling a thiocyanate salt |
| titanic acid | A white weak acid that is a hydrated form of titanium dioxide |
| toluic acid | An isomeric acid derived from toluene |
| tribasic acid | An acid containing three replaceable hydrogen atoms per molecule |
| triphosphoric acid | An acid that is a partial anhydride of three molecules of phosphoric acid |
| undecylenic acid | An acid that is a component of perspiration |
| uric acid | A white tasteless odorless crystalline product of protein metabolism |
| vitriol, oil of vitriol, sulfuric acid, sulphuric acid | (H2SO4) a highly corrosive acid made from sulfur dioxide |
| xanthic acid | Any of a class of unstable organic acids containing sulphur |
| Broader | compound, chemical compound | (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight |
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| Spanish | ácido |
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| Catalan | àcid |
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| Adjectives | acid | having the characteristics / characteristics of an acid |
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| Verbs | acidify | turn acidic |
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| acidify, acidulate | make sour or more sour |
