sidereal time(redirected from Sideral day)
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Related to Sideral day: synodic month
Time based on the rotation of the earth with reference to the background of stars.
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) time based upon the rotation of the earth with respect to the distant stars, the sidereal day being the unit of measurement. See also sidereal day
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
time measured by the diurnal motion of stars.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Time measured by Earth’s rotation against the stars.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||sidereal time - measured by the diurnal motion of stars|
cosmic time - the time covered by the physical formation and development of the universe
sidereal day, day - the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
sidereal year - the time for the earth to make one complete revolution around the sun, relative to the fixed stars
sidereal hour - 1/24 of a sidereal day
sidereal month - period between successive conjunctions with a star, 27.322 days
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