- 1.1The god of the underworld, one of the sons of Cronus. Roman equivalent Pluto.
- More example sentences
- ‘It's been an article of faith that the Hadean period was a hellish time, but it's time to come up with a new name,’ he said.
- You might wish to start in the Cenozoic Era (65 million years ago to the present) and work back through time, or start with Hadean time (4.5 to 3.8 billion years ago) and journey forward to the present day.
- The Hadean has also sometimes been called the Priscoan.
from Greek Haidēs, of unknown origin.