sidereal hour

noun

: the 24th part of a sidereal day

Word History

First Known Use

circa 1695, in the meaning defined above

Time Traveler
The first known use of sidereal hour was circa 1695

Dictionary Entries Near sidereal hour

Cite this Entry

“Sidereal hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sidereal%20hour. Accessed 23 Jul. 2024.

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