Indicator

Indicator is a term used in various fields, including chemistry, medicine, and economics, to denote a measure or sign that reveals the state or level of something. In medicine, an indicator can refer to a substance, characteristic, or process that provides evidence of a disease or physiological state.

Chemical Indicators[edit | edit source]

In Chemistry, an indicator is a substance that changes color in response to a chemical change. An acid-base indicator (e.g., litmus paper) changes color depending on the pH of the solution. Redox indicators are also frequently used, a common example is the substance diphenylamine, which turns blue in response to oxidation.

Medical Indicators[edit | edit source]

In Medicine, an indicator is a measure, symptom or sign that can be observed in a patient and is associated with a particular disease or medical condition. Indicators in medicine can be as simple as a fever indicating an infection, or as complex as a detailed analysis of blood work.

Economic Indicators[edit | edit source]

In Economics, an indicator is a statistic about economic activity. Economic indicators allow analysis of economic performance and predictions of future performance. Examples include unemployment rates, GDP and inflation rates.

Environmental Indicators[edit | edit source]

In Environmental Science, an indicator is an organism or species whose presence, absence or abundance reflects a specific environmental condition. Indicator species can signal a change in environmental conditions such as pollution or climate change.

See Also[edit | edit source]

Indicator Resources
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