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Related to sidereal hour: sidereal time
A 24th part of a sidereal day.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Astronomy) a 24th part of a sidereal day
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|Noun||1.||sidereal hour - 1/24 of a sidereal day|
sidereal time - measured by the diurnal motion of stars
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