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concentration
concentrate
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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con·cen·trate
/ ˈkänsənˌtrāt/
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v.
1. [intr.]
focus one's attention or mental effort on a particular object or activity:
she couldn't concentrate on the movie.
∎ (concentrate on/upon)
do or deal with (one particular thing) above all others:
Luke wants to concentrate on his film career.
2.
[tr.] (often be concentrated)
gather (people or things) together in numbers or in a mass to one point.
∎ [intr.]
come together in this way:
troops were concentrating at the western front.
∎
increase the strength or proportion of (a substance or solution) by removing or reducing the water or any other diluting agent or by selective accumulation of atoms or molecules.
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n.
a substance made by removing water or other diluting agent; a concentrated form of something, esp. food:
apple juice concentrate.
DERIVATIVES:
con·cen·tra·tive
/ -ˌtrātiv/ adj.
con·cen·tra·tor
/ -ˌtrātər/ n.
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Concentration Gradient
Book article from: Chemistry: Foundations and Applications
Concentration Gradient A concentration gradient occurs where the concentration of something changes over a certain distance. For example, a few drops of food dye in a glass of water diffuse along the concentration gradient, from where the dye...
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Concentration Camps
Encyclopedia entry from: International Encyclopedia of the Social Sciences
Concentration Camps The concentration camp has become a paradigmatic symbol for oppression of the...x201C; other. ” The Oxford Dictionary defines a concentration camp as “ a camp where non-combatants of a district...
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concentration camps
Book article from: The Oxford Companion to World War II
concentration camps See also GUlag ; see Map 31 for sites of principal concentration camps. Concentration camps were one of the most important instruments of terror in Nazi Germany. Forecast by Hitler as early as 1921, they were first employed...
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concentration
Book article from: The Columbia Encyclopedia, Sixth Edition
...equilibrium ). Concentration may be expressed...statement of the concentrations of the components...percentages. Very low concentrations may be expressed...of expressing concentration, several others...molecules, their concentrations cannot be expressed...Instead, the concentration ...
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Concentration
Encyclopedia entry from: The Gale Encyclopedia of Science
...accurate. For example, the concentration of nitrogen in the atmosphere...molarity is a useful unit of concentration. It is the number of moles...Other useful units of concentrations are molality, or the number...of dissolved solids. The concentration of a radioactive gas such...
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