The new team faced its first acid test when it played the national champions.
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Additional sugar and acid tests are planned to confirm whether the liquid contains apple-specific compounds, like malic acid.—Andrea Margolis, FOXNews.com, 15 Feb. 2026 This was a place and time in history of tremendous creativity that grew out of the acid test parties, the beatnik poets, and the Summer Of Love.—Brian Halligan, Fortune, 25 Nov. 2025 The azaleas will be the acid test.—Inga, San Diego Union-Tribune, 27 Oct. 2025 Andrew Harnik | Getty Images Russia's drone incursion into Poland now poses an acid test for NATO and the European Union.—Sam Meredith, CNBC, 11 Sep. 2025 See All Example Sentences for acid test
Word History
Etymology
so called from the use of nitric acid to determine the gold content of jewelry