sidereal hour


Definition of sidereal hour

: the 24th part of a sidereal day

First Known Use of sidereal hour

circa 1695, in the meaning defined above

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The first known use of sidereal hour was circa 1695

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Dictionary Entries Near sidereal hour

sidereal day

sidereal hour

sidereal hour angle

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Cite this Entry

“Sidereal hour.” Dictionary, Merriam-Webster, Accessed 24 Oct. 2021.

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