concentration

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English

Etymology

concentrate +‎ -ion

Pronunciation

Noun

concentration (usually uncountable, plural concentrations)

  1. The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
    1. The direction of attention to a specific object.
    2. The act, process or product of reducing the volume of a liquid, as by evaporation.
    3. The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.
  2. A field or course of study on which one focuses, especially as a student in a college or university.
  3. The proportion of a substance in a whole.
    • 1972, Leo A. Orleans, Every Fifth Child: The Population of China, Stanford, CA: Stanford University Press, →ISBN, →LCCN, →OCLC, →OL, page 117:
      The Koreans
      Almost all the Koreans in China live in the north-eastern provinces. The greatest concentration is found in an area of approximately 1,200 square miles in Kirin Province, an area which is part of the Yen-pien Korean Autonomous Chou.
    • 2013 July-August, Philip J. Bushnell, “Solvents, Ethanol, Car Crashes & Tolerance”, in American Scientist:
      Surprisingly, this analysis revealed that acute exposure to solvent vapors at concentrations below those associated with long-term effects appears to increase the risk of a fatal automobile accident. Furthermore, this increase in risk is comparable to the risk of death from leukemia after long-term exposure to benzene, another solvent, which has the well-known property of causing this type of cancer.
    1. (chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))
  4. The matching game pelmanism.

Coordinate terms

Derived terms

Translations

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See also

Further reading

French

Etymology

First attested 1732, from concentrer +‎ -ation.

Pronunciation

Noun

concentration f (plural concentrations)

  1. concentration (mental state of being concentrated)
  2. concentration (quality of being concentrated)
    la concentration de sucre
    the concentration of sugar

Derived terms

Descendants

  • Romanian: concentrație
  • Turkish: konsantrasyon

Further reading

Interlingua

Noun

concentration (plural concentrationes)

  1. concentration (state or degree of being concentrated)