[ee-uh n, ee-on] /ˈi ən, ˈi ɒn/
an indefinitely long period of time; age.
the largest division of geologic time, comprising two or more eras.
Astronomy. one billion years.
the usual US spelling of aeon
(geology) the longest division of geological time, comprising two or more eras
1640s, from Latin aeon, from Greek aion “age, vital force, a period of existence, lifetime, generation;” in plural, “eternity,” from PIE root *aiw- “vital force, life, long life, eternity” (cf. Sanskrit ayu “life,” Avestan ayu “age,” Latin aevum “space of time, eternity,” Gothic aiws “age, eternity,” Old Norse ævi “lifetime,” German ewig “everlasting,” Old English a “ever, always”).
The longest division of geologic time, containing two or more eras.
1. Executive Office of the President.
[ee-os] /ˈi ɒs/ noun 1. the ancient Greek goddess of the dawn, identified by the Romans with Aurora. /ˈiːɒs/ noun 1. (Greek myth) the winged goddess of the dawn, the daughter of Hyperion Roman counterpart Aurora 1. earth observation satellite 2. earth observing system 3. end of story 4. enter stop order
Earth Observation Satellite Company