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Definition of optical rotation in English:

optical rotation

Pronunciation /ˈäptəkəl rōˈtāSHən/ /ˈɑptəkəl roʊˈteɪʃən/

noun

Chemistry

  • The rotation of the plane of polarization of plane-polarized light by an optically active substance.

    • ‘The effect of conformation on the optical rotation was confirmed by a study of the temperature dependence of the rotation.’