what is asymmetric?

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    a·sym·met·ric (s-mtrk) also a·sym·met·ri·cal (-r-kl)
    1. Having no balance or symmetry.
    2. Chemistry Of or relating to a carbon atom having four different atoms or structural groups attached to it, resulting in an unbalanced spatial arrangement of atoms in a molecule, so that the molecule cannot be superimposed on its mirror image; chiral.
    asym·metri·cal·ly adv.
    The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
    asymmetric [?æs??m?tr?k ?e?-], asymmetrical
    1. not symmetrical; lacking symmetry; misproportioned
    2. (Chemistry) Chem
    a. (of a molecule) having its atoms and radicals arranged unsymmetrically
    b. (of a carbon atom) attached to four different atoms or radicals so that stereoisomerism results
    c. involving chiral molecules asymmetric synthesis
    3. (Engineering / Electrical Engineering) Electrical engineering (of conductors) having different conductivities depending on the direction of current flow, as of diodes
    4. (Engineering / Aeronautics) Aeronautics having unequal thrust, as caused by an inoperative engine in a twin-engined aircraft
    5. (Philosophy / Logic) (Mathematics) Logic maths (of a relation) never holding between a pair of values x and y when it holds between y and x, as ''…is the father of…'' Compare symmetric [1] antisymmetric, nonsymmetric
    asymmetrically adv
    Collins English Dictionary – Complete and Unabridged © H

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