chromophore

Noun

 * 1)  that part of the molecule of a dye responsible for its colour
 * 2)  (more generally) the group of atoms in a molecule in which the electronic transition responsible for a given spectral band is located

Translations

 * Catalan: cromòfor
 * Chinese:
 * Mandarin:
 * Italian: cromoforo
 * Spanish: cromóforo