Indicator may refer to:

Biology

  • Environmental indicator of environmental health (pressures, conditions and responses)
  • Ecological indicator of ecosystem health (ecological processes)
  • Health indicator, which is used to describe the health of a population
  • Honeyguides, also known as "indicator birds", a family of Old World tropical birds
  • Indicator (genus), a genus of birds in the honeyguide family
  • Indicator species, a species that defines a characteristic of an environment
  • Indicator bacteria, bacteria used to detect and estimate the level of fecal contamination of water
  • Indicator organism, organisms used to measure such things as potential fecal contamination of environmental samples
  • Indicator plant, a plant that acts as a measure of environmental conditions
  • Indicator value, one of two terms in ecology referring to the classification of organisms
  • Iodine–starch test, a method to test for the presence of starch or iodine.

Chemistry

  • Complexometric indicator, a chemical detector for metal ions in complexometric titrations.
  • Humidity indicator card, a card impregnated with chemicals that change colour when a particular humidity is exceeded.
  • pH indicator, a chemical detector for protons in acid-base titrations.
  • Redox indicator, a chemical detector for redox titrations.
  • Zeta potential, a property of interfaces in fluids for Zeta potential titration.

Economics

  • Economic indicator
  • Macroeconomic indicators, economic indicators provided by agencies and bureaus of various government statistical organizations and sometimes by private organizations
  • Performance indicator
  • Technical indicator, a tool used in the technical analysis of financial securities

Mathematics, engineering, and industry

  • Indicator (distance amplifying instrument), any of various instruments used to accurately measure small distances, and amplify them to make them more obvious
  • Indicator (metadata), a Boolean value that may contain only the values true or false and includes the meaning of these values
  • Indicator (statistics), a concept in statistics, research design and social sciences
  • Indicator diagram, a graph of pressure against stroke within a piston engine
  • Indicator function of a subset of the domain, a concept in mathematics
  • Indicator light
  • Indicator net, nets anchored at various depths to the sea bed around Allied naval bases during World War II intended to entangle U-boat traffic of the enemy
  • Indicator of compromise, an artifact observed in computer forensics that indicates an intrusion

Other uses

  • Indicator (Deine Lakaien album), 2010
  • Indicator (Onward to Olympas album), 2012
  • Indicator Island, in the Argentine Islands of Antarctica
  • The Indicator (1819–1821), a weekly literary journal edited by Leigh Hunt
  • The Indicator, a daily podcast produced by Planet Money
  • A synonym for the turn signal of an automobile

See also

  • Indicate/indication (disambiguation)