(ש"ע) ליטמוס, לקמוס (חומר כחול)

n. blue coloring substance extracted from lichens which turns red in acids and is restored to blue in alkalis (used as a chemical indicator)

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Noun
1. 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
(synonym) litmus test
(hypernym) acid-base indicator
(substance-holonym) litmus paper

nm. litmus, blue coloring substance extracted from lichens

n. lakmus