From Longman Dictionary of Contemporary Englishacidac‧id1 /ˈæsɪd/ ●●○ W3 noun 1 [countable, uncountable]HC a chemical substance that has a pH of less than 7. Strong acids can burn holes in material or damage your skin sulphuric acid2 MDD[uncountable] informal the drug LSD
Examples from the Corpus
acid• We subsequently determined the soluble faecal concentrations of calcium, phosphate, fatty acids, and bile acids.• One factor contributing to this malaise is the buildup of lactic acid in the muscles that can follow heavy drinking.• There was no significant difference between the linoleic acid and the eicosapentaenoic acid supplemented groups.• A chronometer is hidden within all words, and in each length of nucleic acid.• Some of these complexes form immensely complicated sequences of nucleic acids which begin to replicate themselves.• Saturated hydrocarbons can burn to aldehydes, alcohols to organic acids, and aromatics to unsaturated compounds which are pungent and irritating.• But amygdalin reacts with an enzyme in the almond to produce glucose and two very characteristic compounds, benzaldehyde and prussic acid.• Inject a minimum of 10 gallons of sulfuric acid.• sulfuric acidacidacid2 adjective 1 CThaving a sharp sour taste SYN bitter a juicy apple with a slightly acid flavour2 → acid remark/comment/tone etc3 → the acid test4 technicalTAS an acid soil does not contain much lime1(3) Blueberry bushes need a very acid soil. —acidity /əˈsɪdəti/ noun [uncountable]Examples from the Corpus
acid• Because of acid rain, this Scandinavian lake is now too acid to support fish.• Smog and acid rain, water pollution and sewage disposal, dams and river-flows will become ever more contentious issues.• Sulphur goes on to produce acid rain.• In general, ferns like organically enriched, moist but well-draining soil on the acid side.Origin acid2 (1600-1700) French acide, from Latin acidus, from acere “to be sour” 