noun
- The earliest eon in the history of the Earth from the first accretion of planetary material (around 4, 600 million years ago) until the date of the oldest known rocks (about 3, 800 million years ago. ; no evidence of life).
- synonyms: Hadean, Hadean time, Hadean eon, Hadean aeon, Priscoan eon, Priscoan aeon
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). priscoan. Retrieved September 24, 2026, from http://smartdefine.org/priscoan/definitions/1303962 |
| Chicago | WordNet. 2010. "priscoan" http://smartdefine.org/priscoan/definitions/1303962 (accessed September 24, 2026). |
| Harvard | WordNet 2010, priscoan, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/priscoan/definitions/1303962>. |
| MLA | WordNet. "priscoan" 23 October 2010. Web. 24 September 2026. <http://smartdefine.org/priscoan/definitions/1303962> |