metamerism

From μετά (metá, “among”) + μερισμός (merismós, “rationing”) (< μέρος (méros, “part”) + -ισμός (-ismós, “-ism”)).

metamerism (usually uncountable, plural metamerisms)

1. (biology) The segmentation of the body into similar discrete units.
2. (psychology) The matching of a perceived attribute between objects with differing physical attributes.
   1. (colorimetry) The matching of apparent color of objects with different spectral power distributions.
3. (chemistry) Structural isomerism.

• metamer
• metamere
• metameric