acidacid2 adjective 
a juicy apple with a slightly acid flavour2acid remark/comment/tone etc an acid remark uses humour in an unkind way to criticize someone: I was expecting another of his acid remarks, but he remained silent.3the acid test a way of finding out whether something is as good as people say it is, whether it works, or whether it is true: People ask if the team is good enough. This match will be the acid test.4technical an acid soil does not contain much lime1(3): Blueberry bushes need a very acid soil.—acidity /əˈsɪdəti/ noun [uncountable]
WORD ORIGINacid2
Origin:
1600-1700 French acide, from Latin acidus, from acere ‘to be sour’EXAMPLES FROM THE CORPUS
- Because of acid rain, this Scandinavian lake is now too acid to support fish.
- In general, ferns like organically enriched, moist but well-draining soil on the acid side.
- 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.
WORD SETS
acid, adjectiveacidic, adjectivebitter, adjectivebittersweet, adjectivebland, adjectivechalky, adjectivechocolatey, adjectivefishy, adjectivefloury, adjectivefoul, adjectivegamey, adjectivegamy, adjectiveminty, adjectivemoreish, adjectivenutty, adjectivepalatable, adjectivepalate, nounpeppery, adjectiveplummy, adjectiveripe, adjectivesavour, nounsavoury, adjectivesharp, adjectivesmooth, adjectivesoapy, adjectivesour, adjectivespearmint, nounsweet, adjectivesweet-and-sour, adjectivesweetness, nountang, nountaste, verbvanilla, adjectivevinegary, adjectivezing, noun
COLLOCATIONS FROM OTHER ENTRIES phosphoric acid
phosphoric acid (=rain which contains pollution from factories)· forests which have been damaged by acid rain
· Blueberries need acid soil.
COLLOCATIONS FROM THE CORPUSNOUN· They were keen to combat acid rain, freeze carbon dioxide emissions and improve public transport.· Smog and acid rain, water pollution and sewage disposal, dams and river-flows will become ever more contentious issues.· Carbonates destroyed by the acid rain release vast quantities of carbon dioxide into the atmosphere.· For the pupils it's a graphic introduction to how acid rain starts out.· By the time he and his colleagues had completed the 1979 follow-up study, acid rain was much in the news.· Sulphur goes on to produce acid rain.
· For my own small study, the acid test was one of relevance.
PHRASES FROM THE ENTRY► acid remark/comment/tone etcPHRASES FROM OTHER ENTRIES
1having a sharp sour taste SYN bitter: - The acid test of a good leader is the extent to which they select a style to suit the circumstances.
- For my own small study, the acid test was one of relevance.
- The critical question, the acid test of socialism, is the distribution of power at the point of production.
- There were the heavy rooms for dropping acid or taking mushrooms.
a juicy apple with a slightly acid flavour2acid remark/comment/tone etc an acid remark uses humour in an unkind way to criticize someone: I was expecting another of his acid remarks, but he remained silent.3the acid test a way of finding out whether something is as good as people say it is, whether it works, or whether it is true: People ask if the team is good enough. This match will be the acid test.4technical an acid soil does not contain much lime1(3): Blueberry bushes need a very acid soil.—acidity /əˈsɪdəti/ noun [uncountable]