- [uncountable, countable] (chemistry) a chemical, usually a liquid, that contains hydrogen and has a pH of less than seven. The hydrogen can be replaced by a metal to form a salt. Acids usually have a bitter sharp taste and can often burn holes in or damage things they touch.
- The acid burned a hole in her coat.
- Stomach acids can break down the poison.
- You will need a special chemical to neutralize the acid.
Oxford Collocations Dictionaryadjective- concentrated
- strong
- dilute
- …
- produce
- neutralize
- burn something
- break something down
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- [uncountable] (slang) a powerful illegal drug that affects people’s minds and makes them see and hear things that are not really there synonym LSD
- They smoke joints and drop acid.
- He described the music as ‘Brahms on acid’.
Oxford Collocations Dictionaryverb + acid- drop
- on acid
Word Originearly 17th cent. (in the sense ‘sour-tasting’): from Latin acidus, from acere ‘be sour’.
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acid