sidereal month
noun
plural sidereal months
: the mean time of the moon's revolution in its orbit with reference to a star's position : 27 days, 7 hours, 43 minutes, 11.5 seconds of mean time
The Moon rotates on its axis once every 27.32166 days. This is the sidereal month and corresponds to the time taken for the average period of revolution of the Moon about the Earth.—
Stuart Ross Taylor
Stuart Ross TaylorDictionary Entries Near sidereal month
Cite this Entry
“Sidereal month.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sidereal%20month. Accessed 26 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share