diurnal motion

noun

Definition of diurnal motion

: the apparent westward motion of the celestial sphere and celestial bodies resulting from the rotation of the earth also : the earth's rotation

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“Diurnal motion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diurnal%20motion. Accessed 29 Nov. 2020.

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