English version

litmus paper in Chemistry topic

From Longman Dictionary of Contemporary Englishlitmus paperˈlitmus ˌpaper noun [uncountable]  HCpaper containing litmus, used to test whether a chemical is an acid or an alkali
Examples from the Corpus
litmus paperThe use of litmus paper furnishes another example of such a transformation.In a drawer the litmus paper mused upon which way to turn.The litmus paper turned red when immersed in the liquid.