platonic-year

Platonic year

noun Astronomy.
a period of about 26,000 years, equal to the time required for a complete revolution of the equinoxes.
Also called great year.


Origin:
1630–40

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
platonic year

noun
time required for one complete cycle of the precession of the equinoxes, about 25,800 years [syn: great year
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Platonic-year is always a great word to know.
So is doohickey. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a gadget; dingus; thingumbob.
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