from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A chemical group capable of selective light absorption resulting in the coloration of certain organic compounds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. that part of the molecule of a dye responsible for its colour
- n. (more generally) the group of atoms in a molecule in which the electronic transition responsible for a given spectral band is located
from the GNU version of the Collaborative International Dictionary of English
- n. Any chemical group or residue (as NO2; N2; or O2) which imparts some decided color to the compound of which it is an ingredient.
from The Century Dictionary and Cyclopedia
- n. A chromophorous substance.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the chemical group that gives color to a molecule
Sorry, no etymologies found.