from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Isomerism created by differences in the spatial arrangement of atoms in a molecule.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A form of isomerism in which atoms are arranged differently about a chiral centre (or centre of asymmetry); they exhibit optical activity; in a molecule with a single chiral centre the two isomers (enantiomers) are mirror images of each other; in a molecule with multiple chiral centres the isomers (diastereoisomers) are not normally mirror images.
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