Crossword puzzle clue "division of about one billion years"

Here are the possible solutions for division of about one billion years clue

Answer
Clue
Relevancy
eon
Clue
Division of about one billion years
Years and years and years
Definition
a long period of time, also AEON
ncaa
Clue
Group that labels schools as Division I, Division II, or Division III: Abbr.
ages
Clue
Years and years and years
Definition
AGE, to grow old
eons
Clue
Years and years and years
Definition
EON, a long period of time, also AEON
aeon
Clue
One billion years
One billion years (Var.)
One spelling of a billion years
Definition
the largest division of geological time, composed of several eras, also EON

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