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secondary rainbow

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noun
a faint rainbow formed by light rays that undergo two internal reflections in drops of rain, appearing above the primary rainbow and having its colors in the opposite order.
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Origin of secondary rainbow

First recorded in 1785–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use secondary rainbow in a sentence

  • Why are the colours of the secondary rainbow fainter than those of the primary?

    The Reason Why|Anonymous
  • Very commonly a secondary rainbow is seen, concentric with the primary bow, and having a radius of about 50 degrees.

    Meteorology|Charles Fitzhugh Talman
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