Definition from Wiktionary, the free dictionary
Hadean (not comparable)
- (geology) Of, or relating to the geologic eon from about 4,600 to 3,800 million years ago; marked by the formation of the solar system, a stable Earth-Moon orbit and the first rocks.
of geologic eon from 4,600 to 3,800 million years ago
- (geology) The Hadean eon.