Longman Dictionary of Contemporary English homepage

Topic: DRUG CULTURE

acid

1 noun
     
ac‧id1 W2
1 [uncountable and countable]HC a chemical substance that has a pH of less than 7. Strong acids can burn holes in material or damage your skin:
sulphuric acid
2MDD [uncountable] informal the drug LSD
Definition of acid from the Longman Dictionary of Contemporary English within
the topic DRUG CULTURE
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