Platonic year

noun

, Astronomy.

1. a period of about 26,000 years, equal to the time required for a complete revolution of the equinoxes.

Word History and Origins

Origin of Platonic year¹

First recorded in 1630–40

Example Sentences

There is a figure of the great Platonic year with a phenix on his hand on the reverse of a medal of Adrian.

From Project Gutenberg

Oh for the revolution of the great Platonic year, that those times might come over again!

From Project Gutenberg