What does "litmus" mean?
A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels.
Litmus
/ˈlɪtməs/ noun
noun ·Rare ·Advanced level
Meaning at a glance
- Primary sense: A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels.
- Grammar: litmus is listed as noun.
- Nearest alternatives: acid base indicator, benchmark, chemical indicator, criterion.
- Usage evidence: When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it.
How to use "litmus"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "litmus" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "litmus" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "litmus" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "litmus" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
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- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "litmus" is acting as noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "acid base indicator" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "litmus", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels. uncountable
- 2 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 wordnet
- 3 A simple test of acidity in a liquid using litmus, usually in the form of litmus paper. countable, uncountable
- 4 A simple test of any attribute; a litmus test. countable, uncountable
Synonyms
All synonymsExample
"When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it."
Common questions
What is a synonym for "litmus"?
Common synonyms include: acid base indicator, benchmark, chemical indicator, criterion, indicator, indicator dye.
How do you use "litmus" in a sentence?
When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it.
How do you pronounce "litmus"?
Pronounced /ˈlɪtməs/.
Etymology
From Middle English litmose, lytmose, litemose, from Old Norse litmosi (“moss used for dyeing”), from lita (“to dye, stain”) + mosi (“moss”), the former from litr (“colour, dye, blee”), from Proto-Germanic *wlitiz, *wlituz (“appearance, blee”), from Proto-Indo-European *wel- (“to see”). Cognate with Old English wlite (“appearance, form, brightness, countenance”). More at moss.