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, Priscoan aeon
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). Priscoan eon. Retrieved September 21, 2026, from http://smartdefine.org/priscoan_eon/definitions/1303963 |
| Chicago | WordNet. 2010. "Priscoan eon" http://smartdefine.org/priscoan_eon/definitions/1303963 (accessed September 21, 2026). |
| Harvard | WordNet 2010, Priscoan eon, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/priscoan_eon/definitions/1303963>. |
| MLA | WordNet. "Priscoan eon" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/priscoan_eon/definitions/1303963> |