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diurnal circle

American  

noun

Astronomy.

  1. the apparent circle described by a heavenly body as a result of one rotation by the earth.

Example Sentences

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And if this activity be catenated with the diurnal circle of actions, an increasing inflammation is produced; as in the evening paroxysms of small-pox, and other fevers with inflammation.

From Zoonomia, Vol. I Or, the Laws of Organic Life by Darwin, Erasmus

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.