diurnal motion

American  

noun

Astronomy.

1. the apparent daily motion, caused by the earth's rotation, of celestial bodies across the sky.

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diurnal motion British  

noun

1. motion that occurs during the day or daily, such as the diurnal rotation of the celestial sphere

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Example Sentences

The Earth's Diurnal motion prov'd by the motion of the Comets, 1.

From Philosophical Transactions of the Royal Society - Vol 1 - 1666 Giving some Accompt of the present Undertakings, Studies, and Labours of the Ingenious in many considerable parts of the World by Oldenburg, Henry

Of the Diurnal motion of the Earth and Planets.

From Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained by Jones, Thomas P.