Aeon: This is the most common spelling, derived from the Greek word "aion" meaning "age," "long period of time," or "eternity." It is often used to refer to a vast and indefinite period of time, often associated with cosmic or divine scales.
Eon: This spelling is also fairly common and is often used in scientific contexts, specifically in geology. It refers to a major division of geological time, spanning hundreds of millions of years.
Eon: This spelling is less common and is considered archaic. It is sometimes used in literature or poetry to evoke a sense of antiquity or grandeur.
Other related terms:
* Eons: This is the plural form of "eon" and "aeon."
* Aeonic: This adjective means "relating to or lasting for an aeon."
In summary:
While "Aeon" is the most common spelling, "Eon" is also widely accepted and often preferred in scientific contexts. The archaic "Eon" is sometimes used for stylistic effect. Each spelling carries a slightly different nuance, but all ultimately refer to an extremely long period of time.