sidereal time

noun

Definition of sidereal time

1 : time based on the sidereal day
2 : the hour angle of the vernal equinox at a place

First Known Use of sidereal time

1765, in the meaning defined at sense 1

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The first known use of sidereal time was in 1765

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Cite this Entry

“Sidereal time.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sidereal%20time. Accessed 24 Oct. 2020.

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