concentration

nouns

the strength of a solution; number of molecules of a substance in a given volume
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a basic or essential attribute shared by all members of a class
"a study of the physical properties of atomic particles"
the spatial property of being crowded together
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antonym
strengthening the concentration (as of a solute in a mixture) by removing diluting material
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antonym
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the act of increasing the strength of something
increase in density
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a change resulting in an increase
"the increase is scheduled for next month"
complete attention; intense mental effort
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bringing together military forces
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the social act of assembling
"they demanded the right of assembly"
great and constant diligence and attention
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