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Noun eon has 3 senses
- eon, aeon - the longest division of geological time
--1 is a kind of geological time, geologic time
--1 has parts: era, geological era
- eon, aeon - an immeasurably long period of time
--2 is a kind of long time, age, years
--2 has particulars:
| ||Phanerozoic, Phanerozoic eon, Phanerozoic aeon; Precambrian, Precambrian eon, Precambrian aeon, Precambrian period; Proterozoic, Proterozoic eon, Proterozoic aeon; Archean, Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon; Hadean, Hadean time, Hadean eon, Hadean aeon, Priscoan, Priscoan eon, Priscoan aeon|
- eon, aeon - (Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe
--3 is a kind of spiritual being, supernatural being