optical anomaly

optical anomaly

[′äp·tə·kəl ə′näm·ə·lē]
(physical chemistry)
The phenomenon in which an organic compound has a molar refraction which does not agree with the value calculated from the equivalents of atoms and other structural units composing it.
References in periodicals archive ?
An overall symmetry and classically planar spatial recession stabilize and give stateliness to Moore's compositions while also providing ballast for so many sorties into realities where optical anomaly and fantasy intersect.

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