Gigayear
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 A billion years: a thousand million years, that is, a thousand thousand thousand years.
"Holonyms: exasecond < zettasecond < yottasecond < ronnasecond < quettasecond"
Example
More examples"Holonyms: exasecond < zettasecond < yottasecond < ronnasecond < quettasecond"
Etymology
From giga- + year.