diurnal arc

noun

: the portion of the diurnal circle of a celestial body that is above the observer's horizon
the diurnal arc of the sun is its apparent path from sunrise to sunset

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Cite this Entry

“Diurnal arc.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diurnal%20arc. Accessed 17 Jul. 2024.

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