Synonyms for sidereal day

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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This 5th day is the sidereal day of the astronomers and is the basis of our time, so it is entitled to a little attention.

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.