circumhorizontal arc

noun

An optical phenomenon, a large, brightly spectrum-coloured band running parallel to the horizon, formed by the refraction of sunlight or moonlight in plate-shaped ice crystals suspended in the atmosphere, typically in cirrus or cirrostratus clouds.

Similar
fire rainbow
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Meanings

nouncircumhorizontal arc (plural circumhorizontal arcs)

plural circumhorizontal arcs

  1. An optical phenomenon, a large, brightly spectrum-coloured band running parallel to the horizon, formed by the refraction of sunlight or moonlight in plate-shaped ice crystals suspended in the atmosphere, typically in cirrus or cirrostratus clouds.

    Synonyms: fire rainbow

Synonyms & antonyms

nounAn optical phenomenon, a large, brightly spectrum-coloured band running parallel to the horizon, formed by the refraction of sunlight or moonlight in plate-shaped ice crystals suspended in the atmosphere, typically in cirrus or cirrostratus clouds.

Similar
fire rainbow
Also see
fire rainbow
Cite this entry
APA

circumhorizontal arc. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/circumhorizontal%20arc

MLA

“circumhorizontal arc.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/circumhorizontal%20arc. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “circumhorizontal arc,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/circumhorizontal%20arc.

Source: circumhorizontal arc on Wiktionary, CC BY-SA 4.0.