“Metamer: Either of a pair of colors that appear identical but have different spectral compositions and are therefore composed of different wavelengths. A mixture of two non-complementary colors produces a color that appears identical to a pure color intermediate on the color circle between the component colors of the mixture but that has a different spectral composition from the pure color.
[From Greek meta beside + English (iso)mer, from Greek isos equal or the same + meros a part]”
Excerpted from: Colman, Andrew M., ed. Oxford Dictionary of Psychology. New York: Oxford University Press, 2003.
Mark's Text Terminal 