Indicator

Indicator may mean:

pH indicator, a chemical detector for protons in acid-base titrations
Redox indicator, a chemical detector for redox titrations
Complexometric indicator, a chemical detector for metal ions in complexometric titrations
Dial indicator, an instrument that measures small distances
Honeyguide, a genus of birds
Turn signal of an automobile
Economic indicator or business indicator
Ecological indicator of ecological health
Indicator function of a subset of the domain, a concept in mathematics

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