Is there a word for 10000 years?

To follow the same principle from a Latin root form (as Decade, Century etc are latin) then `Decem millennium’ (10,000 years) would arguably be closest to our existing words but it would be unlikely to see common use.

What is 500 years called?

Noun. 1. quincentenary – the 500th anniversary (or the celebration of it) quincentennial.

What is a eon?

Eon, Long span of geologic time. In formal usage, eons are the longest portions of geologic time (eras are the second-longest). Three eons are recognized: the Phanerozoic Eon (dating from the present back to the beginning of the Cambrian Period), the Proterozoic Eon, and the Archean Eon.

What is 10 millenniums called?

The Greek word “myrioi” for 10,000 is the source of “myrietes” and “myrieteris,” which mean “a period of 10,000 years.” Similarly, there is “chilieteris,” a period of 1,000 years, which uses the “chili-” prefix that became our “kilo-.” By the way, there’s a very long word for a myriad of myriads = 10^8 in Greek.

What is a period of 100 000 years called?

The word millennium derives from the Latin mille, thousand, and annus, year.

What’s the span of 100 years called?