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Either of a pair of molecules that are mirror images but cannot be superimposed on each other, and that rotate the plane of polarized light by an equal amount in opposite directions. Also called enantiomorph, optical isomer.

[Greek enantios, opposite; see ant- in Indo-European roots + -mer, isomer.]

en·an′ti·o·mer′ic (-mĕr′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) chem a molecule that exhibits stereoisomerism because of the presence of one or more chiral centres
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ɪˈnæn ti ə mər)

either of a pair of optical isomers that are mirror images of each other.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.enantiomer - either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
to optimise the preparation of enantiopure praziquantel, a treatment for schistosomiasis, that is limited in supply due the difficulty in obtaining sufficient quantities [http://pzq.ourexperiment.org/hydrolysis_pzqj.]
Hence, high enantiomeric purity is essential for the effectiveness of these agents and it is therefore important that these agents are enantiopure. Research has shown that when an enantiomer of a racemic or enantiomerically enriched form is inactive, the potency of the active enantiomer is reduced, similar to the concept of deliberate adulteration.
Since racemization is not possible during the reaction, this method allows the preparation of enantiopure 1,2,3-benzotriazinones in excellent yields.
Eggert, Biocatalytic Production of Enantiopure Cyclohexane-trans- 1,2-diol Using Extracellular Lipases from Bacillus Subtilis, Appl.