eon

noun

1.
the longest division of geological time
hetorica life's eld Seenlifen trisandyear aeon
Derived from:
eonian
2.
an immeasurably long period of time
everyear thrisandyear aeon
Derived from:
eonian
3.
(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe
aeon