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eons - 3 dictionary results

e⋅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.
Also, aeon.


Origin:
see aeon
e·on also ae·on   (ē'ŏn', ē'ən)   
n.  
  1. An indefinitely long period of time; an age.
  2. The longest division of geologic time, containing two or more eras.

[Late Latin aeōn, from Greek aiōn; see aiw- in Indo-European roots.]
eon   (ē'ŏn')  Pronunciation Key 
The longest division of geologic time, containing two or more eras.
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