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

Word History

First Known Use

circa 1574, in the meaning defined above

Time Traveler
The first known use of tropical year was circa 1574

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Dictionary Entries Near tropical year

Cite this Entry

“Tropical year.” Dictionary, Merriam-Webster, Accessed 22 Feb. 2024.

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