litmus paper
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The best way to confirm that the solution is neutralized is with litmus paper.
From Seattle Times ● Nov. 7, 2022
Watson recalls one telling advertising campaign: posters printed on litmus paper that said: “When acid rain is falling, you should see red” – offering a vivid illustration of the problem.
From The Guardian ● Oct. 12, 2020
Peterson's guide also played a role in creating today's environmental awareness; as he explains, birds act as a kind of "ecological litmus paper," reacting to changes in their surroundings long before man does.
From Time Magazine Archive
We are not dealing here," said Acheson, "with the kind of situation where we can go from one country to another with a piece of litmus paper and see whether everything is true blue.
From Time Magazine Archive
With water it forms a mucilage as adhesive as gum arabic, and this solution reddens litmus paper.
From The Medicinal Plants of the Philippines by Jerome Beers Thomas
