Hadean (not comparable)
- Pertaining to Hades or hell.
1902, Frederic Crowninshield, A Painter's Moods, page 49:
- No Ceres weeps at the Hadean gate!
- (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 eon before 4,000 Ma.
- (eon before 4,000 Ma): Precambrian