Con`cen*tra"tion (?), n. [Cf. F. concentration.]
The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration.
Concentration of the lunar beams.
Intense concetration of thought.
Sir J. Herschel.
The act or process of reducing the volume of a liquid, as by evaporation.
The acid acquires a higher degree of concentration.
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.
© Webster 1913.