Saturation
Saturation , noun
[Latin saturatio: compare French saturation.]
1.
The act of saturating, or the state of being saturating; complete penetration or impregnation.
2.
(Chemistry) The act, process, or result of saturating a substance, or of combining it to its fullest extent.
3.
(Optics) Freedom from mixture or dilution with white; purity; -- said of colors.
The degree of saturation of a color is its relative purity, or freedom from admixture with white.