litmus

Again, that pre-communion questionnaire sin litmus test might prove handy.

Applying an ideological litmus test for commencement speakers is not a good idea.

But when did they become the litmus test of competence in office?

So they are a litmus paper for wider fertility—not a significant driver of Israeli birthrates.

Opposition to the Affordable Care Act in toto might linger as a litmus test for conservatives.

The solution of lead must contain acid; and if by keeping it does not change litmus-paper, acid must be added till it does.

The blue litmus paper became red showing the presence of an acid.

When the small residue was completely dry, it was a yellow solid soluble in dilute alcohol and acid to litmus.

Vapors and liquid were given off, both of which turned red litmus blue and had a strong odor like tobacco smoke.

This is an indicator for bases and acids, like litmus, but it is less sensitive to hydroxide-ion than is litmus.