The meaning of LITMUS is a coloring matter from lichens that turns red in acid solutions and blue in alkaline solutions and is used as an acid-base indicator.

Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity.

Litmus turns red in acidic solutions and blue in alkaline solutions and is the oldest and most commonly used indicator of whether a substance is an acid or a base.

LITMUS definition: 1. a powder that is turned red by acid and blue by alkali: 2. a powder that is turned red by acid…. Learn more.

litmus, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

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Definition of litmus noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Discover everything about the word "LITMUS" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.

Mar 1, 2026 · litmus (countable and uncountable, plural litmuses) (uncountable) A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain …

A colored powder, obtained from certain lichens, that changes to red in an acid solution and to blue in an alkaline solution. ♦ Litmus is typically added to paper to make litmus paper, which is used to …