tropical year


Definition of tropical year

: the period occupied by the sun's center in passing from one equinox to the same again and having a mean length of 365 days, 5 hours, 48 minutes, 45.5 seconds : solar year

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First Known Use of tropical year

circa 1574, in the meaning defined above

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The first known use of tropical year was circa 1574

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Cite this Entry

“Tropical year.” Dictionary, Merriam-Webster, Accessed 24 Jan. 2021.

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