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.
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Question 1 of 7
Compare moon pillar.
Origin of sun pillar
First recorded in 1900–05
Words nearby sun pillar
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020