LITMUS TEST

лакмусовая реакция

безошибочный показатель, средство для испытания

litmus test: translation

1. Lit. a test used to determine the acidity or alkalinity of chemical substances. (Acid turns litmus paper red and alkaline compounds turn it blue.) •

I used a litmus test to show that the compound was slightly acid.

2. Fig. a question or experiment that seeks to determine the state of one important factor. •

His performance on the long exam served as a litmus test to determine whether he would go to college.

•

The amount of white cells in my blood became the litmus test for diagnosing my disease.