circumzenithal arc

noun
cir·​cum·​zenithal arc

Definition of circumzenithal arc

: a bright rainbow-colored circular halo arc about the zenith as center convex to the sun and about 46 degrees above it

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History and Etymology for circumzenithal arc

International Scientific Vocabulary circum- + zenithal; originally formed as French circumzénithal

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Dictionary Entries Near circumzenithal arc

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circumzenithal arc

circus

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Cite this Entry

“Circumzenithal arc.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/circumzenithal%20arc. Accessed 20 Sep. 2021.

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