Hypertext Webster Gateway: "concentration"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Dephlegmation \De`phleg*ma"tion\, n. [Cf. F. d['e]flegmation.]
(Chem.)
The operation of separating water from spirits and acids, by
evaporation or repeated distillation; -- called also
{concentration}, especially when acids are the subject of it.
[Obs.]
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Concentration \Con`cen*tra"tion\, n. [Cf. F. concentration.]
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.
From WordNet (r) 1.7 (wn)
concentration
n 1: the strength of a solution; number of molecules of a
substance in a given volume (expressed as moles/cubic
meter)
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},
{absorption}]
6: bringing together military forces
7: great and constant diligence and attention [syn: {assiduity},
{assiduousness}]
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