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optic axis

noun

, Crystallography.
  1. (in a crystal exhibiting double refraction) the direction or directions, uniaxial or biaxial, respectively, along which this phenomenon does not occur.


optic axis

noun

  1. the direction in a uniaxial crystal or one of the two directions in a biaxial crystal along which a ray of unpolarized light may pass without undergoing double refraction


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Word History and Origins

Origin of optic axis1

First recorded in 1655–65

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