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The Collaborative International Dictionary
Chromophore

Chromophore \Chro"mo*phore\, n. [Gr. ? color + fe`rein to bear.] (Chem.) Any chemical group or residue (as NO2; N2; or O2) which imparts some decided color to the compound of which it is an ingredient.

Wiktionary
chromophore

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

WordNet
chromophore

n. the chemical group that gives color to a molecule

Wikipedia
Chromophore

A chromophore is the part of a molecule responsible for its color. The color arises when a molecule absorbs certain wavelengths of visible light and transmits or reflects others. The chromophore is a region in the molecule where the energy difference between two different molecular orbitals falls within the range of the visible spectrum. Visible light that hits the chromophore can thus be absorbed by exciting an electron from its ground state into an excited state.

In biological molecules that serve to capture or detect light energy, the chromophore is the moiety that causes a conformational change of the molecule when hit by light.

Usage examples of "chromophore".

Light entering the eye brings about a change in the chromophore in the first thousandth of a second, and after that the rest of the changes are automatic, a causal chain that results in the experiencing of a vision of some sort.

This bacterial protein, commonly found in salt marshes, included a segment known as a chromophore, which changed its properties when exposed to light.

The absorbed energy initiated a branching reaction, a sequential one photon architecture-a set of wavelength keys fitted across the darkness into a self-repairing chromophore lock originally built of bacterial protein.

Earth possess pliant chromophores, epidermal cells that allow them to radically adjust their skin color and sur-face pattern.

Earth possess pliant chromophores, epidermal cells that allow them to radically adjust their skin color and surface pattern.

Certain cephalo-pods on Earth possess pliant chromophores, epidermal cells that allow them to radically adjust their skin color and sur-face pattern.