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Noun
phanerozoic aeon
has 1 sense
Phanerozoic
,
Phanerozoic eon
,
Phanerozoic aeon
- the period from about 5,400 million years ago until the present
--
1
is a kind of
eon
,
aeon
--
1
has parts:
Cenozoic
,
Cenozoic era
,
Age of Mammals
,
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