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Short "hint"

n. - The phenomenon of different colors appearing when certain crystals are viewed from different directions.

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Usage examples (4)
  • Such an effect is called pleochroism, and crystals which show variations in their colour when viewed from different angles, or by transmitted light, are called...
  • Iceland-spar is extensively used in the construction of Nicol's prisms for polariscopes, polarizing microscopes and saccharimeters, and of dichroscopes for testing the...
  • Biotite, containing haloes, 223; pleochroism of, 235; intensified pleochroism in halo, 235.
  • Because of Iolite's pleochroism (it appears a different color depending on the angle of the light), they could look through the mineral to determine the sun's exact...
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