Wiktionary:Word of the day/2023/July 15

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Word of the day
for July 15
acid test n
  1. (chemistry) A test involving the reaction of an acid with another chemical.
  2. (figuratively) A rigorous test or appraisal of the quality or worth of something.
  3. (by extension, historical) In the 1960s, a party based around the use and advocacy of the psychedelic drug LSD (known in slang as "acid").
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