aeon

aeon [ EE-uh'n, EE-on ]
	[ noun ]
	MEANING :
	1. an indefinitely or immeasurably long period of time; an age 2. the longest division of geological time, containing to or more eras
	USAGE EXAMPLE 1 :
	Mythological stories often span aeons during which the plot thickens and evolves.
	USAGE EXAMPLE 2 :
	He was the astronaut in the original Planet of the Apes (1968) who discovers that the gorilla-dominated world in which he has landed is actually Earth aeons after a nuclear holocaust.