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sun pillar

noun, Astronomy
a halo phenomenon in which a vertical streak of light appears above and below the sun, believed to be caused by the reflection of sunlight by ice crystals with vertical axes.
Compare moon pillar.
Origin of sun pillar
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for sun pillar
  • Lower sun pillar seen extending downward from sun and reflecting on new ice.
  • Notice the sun pillar in the left hand part of the scene.

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