mesomerism noun. [mɪ'sɒmǝrɪz(ǝ)m, mɪ'zɒm-] E20.
[from MESO- after tautomerism.]
Chemistry. The property exhibited by certain molecules of having a structure which cannot adequately be represented by a single structural formula but is intermediate between two or more graphical structures which differ in the distribution of electrons. Also called resonance.

■ meso'meric adjective of, pertaining to, exhibiting, or arising from mesomerism M20.

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