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litmus test

litmus test

9 5.1
One clear sign that shows if something is acceptable
  • noun
  • /ˈlɪt.məs tɛst/
  • Informal
translation icon : prueba decisiva
  • Many believe that a candidate's approach to climate change is a litmus test for their suitability in the upcoming election.

But again, I my litmus test is, are my clients calling me?

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Examples

  • On Friday, Mayor Michael R. Bloomberg condemned that sort of litmus test for businesses.

    Blog text (15)
  • One does not have to pass some sort of litmus test to be a writer or a citizen journalist.

    Blog text (9)
  • And I love that as a litmus test for how good is the thing that I sell.

  • And political reality sometimes means that a litmus test is not a good thing.

    Blog text (4)
  • And that is our litmus test is how does a theatre full of people respond to it?

  • Judges elected by the legislature or appointed are generally subject to various political litmus tests.

    Blog text (15)
  • Friends who care about you on a bad day, that's the real litmus test of a real friend with whom you can have meaningful conversation.

  • The litmus test for this ad is whether it could be comfortably run in Joplin or Oak Creek.

    Blog text (27)
  • And the West, China knows, sees Hong Kong as a litmus test of China's intentions and willingness to honor its commitments.

    Academic text (1999)
  • Within the Muslim community, the hijab has often been used as a litmus test to determine the piety of Muslim women.

    Blog text (12)

Synonyms

standard
vslitmus test
1.6

An agreed level of quality or rule for judging something

is a single clear way to see if something meets that accepted level
to test
vslitmus test
1.0

To check something to see if it works or has a problem

is a single clear question or situation that shows if something is acceptable
criterion
vslitmus test
219 6.1

A rule or standard used to judge and choose something

is focused on one clear sign that shows acceptability rather than a general rule
gold standard
vslitmus test
15 3.9

The best and most trusted example that people use to judge other things

is a single small sign used to show acceptability, not the best example
touchstone
vslitmus test
15 7.5

A way to judge how good or true something is

is a single simple situation that shows if something meets that basis
yardstick
vslitmus test
12 3.9

A way to judge how good or successful something is

is a single clear factor used to check acceptability rather than a broad measure
acid test
vslitmus test
3 4.1

An important test that shows if something really works

is a single clear indicator used to show acceptability rather than absolute proof
criterium
vslitmus test
9.3

A rule used to judge or choose something

is a single clear indicator for acceptability rather than a less frequent term

How Conclusive

litmus test
  • Informal
9 5.1
test
1.0
sign
  • Specialized
805 3.7
indicator
9 3.4
clue
966 1.0

Surface Forms

litmus test singular
litmus tests plural

Morphology

litmus + test

The phrase combines 'litmus' (a dye used to indicate acidity) with 'test', so the figurative sense 'a decisive indicator' is a direct, systematic extension of the literal chemical test. For a learner who knows both constituent words, the metaphorical shift is predictable and the meaning is readily inferable.

Etymology

Litmus test in the figurative sense comes from that clear color change: because litmus gives a fast, obvious result, people call a single clear question or factor a 'litmus test' when it will 'show' if someone or something meets a standard. So it now means one simple thing that decides acceptance.