durum tahlili

listen to the pronunciation of durum tahlili
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litmus test
Any test which produces a decisive result by measuring a single indicator

He opposes a constitutional amendment to ban same-sex marriage—a litmus test for many social conservatives.

A simple test for the acidity or alkalinity of a substance, using litmus paper
use of litmus paper to test the alkalinity or acidity of a solution (Chemistry); test in which one particular event or quality serves as the decisive factor (Figurative)
a test that relies on a single indicator; "her litmus test for good breeding is whether you split infinitives
a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator
If you say that something is a litmus test of something, you mean that it is an effective and definite way of proving it or measuring it. Ending the fighting must be the absolute priority, the litmus test of the agreements' validity The success of wind power represents a litmus test for renewable energy
a test that relies on a single indicator; "her litmus test for good breeding is whether you split infinitives"