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indicator
indicator definition
in·di·ca·tor (in′di kāt′ər)
noun
- a person or thing that indicates; specif.,
- any device, as a gauge, dial, register, or pointer, that measures or records and visibly indicates
- an apparatus that diagrams the varying fluid pressure of an engine in operation
- any of various substances used to indicate the acidity or alkalinity of a solution, the beginning or end of a chemical reaction, the presence of certain substances, etc., by changes in color
- a statistic, as the unemployment rate, used to measure economic or social conditions
- Ecol. a species of plant or animal, or a community, whose occurrence serves as evidence that certain environmental conditions exist
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