con·cen·tra·tion /ˌkɑn(t)sənˈtreʃən, ˌsɛn-/
con·cen·tra·tion /ˌkɑn(t)sənˈtreʃən, ˌsɛn-/ 名詞
1. The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration.
Concentration of the lunar beams. --Boyle.
Intense concetration of thought. --Sir J. Herschel.
2. The act or process of reducing the volume of a liquid, as by evaporation.
The acid acquires a higher degree of concentration. --Knight.
3. Metal. 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.
n 1: the strength of a solution; number of molecules of a
substance in a given volume (expressed as moles/cubic
2: the spatial property of being crowded together [syn: density,
denseness, compactness] [ant: distribution]
3: strengthening the concentration (as of a solute in a
mixture) by removing extraneous material [ant: dilution]
4: increase in density
5: complete attention; intense mental effort [syn: engrossment,
6: bringing together military forces
7: great and constant diligence and attention [syn: assiduity,