Definición de acid test en inglés:

acid test

Saltos de línea: acid test

sustantivo

[in singular]
  • A conclusive test of the success or value of something: gritstone is the acid test of a climber’s ability
    Más ejemplos en oraciones
    • When you apply the acid test of value for money, hardly any make the grade.
    • It can be used as an acid test of whether a person has interest in knowing or may be blinded by ideological convictions.
    • And that, according to any number of people here, is the acid test of the world's new-found determination to stamp out doping.

Origen

figuratively, from the original use denoting a test for gold using nitric acid.

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Palabra del día coloratura
Pronunciación: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody