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| in·di·ca·tor [ índi kàytər ] (plural in·di·ca·tors) |
noun |
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| Definition: |
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1. something that shows what conditions are: something observed or calculated that is used to show the presence or state of a condition or trend
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2. measuring instrument: an instrument or gauge that measures something and registers the measurement
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3. something giving information: something such as a light, sign, or pointer that gives information, e.g. about which direction to follow
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4. ecology
Same as indicator organism
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5. chemistry chemical showing something: a substance that shows the presence or concentration of a specific material or chemical, e.g. litmus
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