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View synonyms for eon

eon

or ae·on

[ ee-uhn, ee-on ]

noun

  1. an indefinitely long period of time; age.
  2. the largest division of geologic time, comprising two or more eras.
  3. Astronomy. one billion years.

eon

/ ˈiːən; ˈiːɒn /

noun

  1. the usual US spelling of aeon
  2. geology the longest division of geological time, comprising two or more eras

eon

/ ē′ŏn′ /

  1. The longest division of geologic time , containing two or more eras.

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Word History and Origins

Origin of eon1

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