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 21, 2026, from http://smartdefine.org/priscoan/definitions/1303962 |
| Chicago | WordNet. 2010. "priscoan" http://smartdefine.org/priscoan/definitions/1303962 (accessed September 21, 2026). |
| Harvard | WordNet 2010, priscoan, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/priscoan/definitions/1303962>. |
| MLA | WordNet. "priscoan" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/priscoan/definitions/1303962> |