# concentration
## English
### Etymology

From New Latin concentrātiō (“(1550) action or an act of coming together at a single place; (1659) extraction or separation of one or more of the metals present in an alloy”). Compare French concentration, Spanish concentración, Italian concentrazione (last quarter of 16th century).

### Pronunciation

* (Received Pronunciation) IPA: /ˌkɒnsənˈtɹeɪʃən/
* (General American) IPA: /ˌkɑnsənˈtɹeɪʃən/
* Audio (US):(file)
* Rhymes: -eɪʃən

### Noun

concentration (usually uncountable, plural concentrations)
* The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
** The direction of attention to a specific object.
** The act, process or product of reducing the volume of a liquid, as by evaporation.
** 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.
* A field or course of study on which one focuses, especially as a student in a college or university.
* 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.
** (physical chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))
* The matching game pelmanism.

#### Coordinate terms

* (course of study): major, minor

#### Derived terms

* bioconcentration
* concentrational
* concentration camp
* concentration cell
* concentration effect
* concentration table
* concentration time
* concentration-time curve
* critical micelle concentration
* cryoconcentration
* deconcentration
* haemoconcentration
* hemoconcentration
* hyperconcentration
* leukoconcentration
* mascon
* minimum inhibitory concentration
* molal concentration
* molar concentration
* n-firm concentration ratio
* nonconcentration
* overconcentration
* preconcentration
* radioconcentration
* reconcentration
* superconcentration
* time of concentration

#### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

### See also

* salinity

### References

* ↑ Oxford English Dictionary, s.v. “concentration (n.),” September 2024, https://doi.org/10.1093/OED/9293800645.

### Further reading

* Concentration (disambiguation) on Wikipedia.Wikipedia
* Concentration (chemistry) on Wikipedia.Wikipedia

## French
### Etymology

First attested 1732, from concentrer +‎ -ation.

### Pronunciation

* IPA: /kɔ̃.sɑ̃.tʁa.sjɔ̃/
* Audio:(file)

### Noun

concentration f (plural concentrations)
* concentration (mental state of being concentrated)
* concentration (quality of being concentrated)
    la concentration de sucrethe concentration of sugar

#### Derived terms

* camp de concentration

#### Descendants

* → Romanian: concentrație
* → Turkish: konsantrasyon

### Further reading

* “concentration”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

## Interlingua
### Noun

concentration (plural concentrationes)
* concentration (state or degree of being concentrated)