Definition of universal indicator in English:

universal indicator

Line breaks: uni|ver¦sal in¦di|ca¦tor

noun

[mass noun] Chemistry
A mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.
More example sentences
  • The easiest universal indicator to prepare is red cabbage juice.
  • The groups are regular acid-base indicators, mixed indicators, screened indicators, universal indicators, pH sticks, litmus paper (embedded in gel or litmus in a gel), natural food indicators, fluorescent indicators, luminescent indicators, irreversible indicators and a miscellaneous group.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day conspicuous
Pronunciation: kənˈspɪkjʊəs
adjective
clearly visible