- e|on
- e|on «EE uhn, -on», noun.1. a very long period of time; many thousands of years: »
Eons passed before life existed on the earth.
2. Geology, Astronomy. one billion years: »Eon [is] geologic shorthand for a period of one billion years (James E. Oberg). “Aeon” is being increasingly used by earth and planetary scientists as a convenient short synonym for “billion years” (Science News).
Also, aeon.╂[< Latin aeōn < Greek ailifetime, age]
Useful english dictionary. 2012.