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Cryogenian
Origin
Full definition of Cryogenian
Adjective
Cryogenian
(
geology
) Of a
geologic
period
within the
Neoproterozoic
era
from about 850 to 600 million years ago.
Proper noun
Cryogenian
(
plural
Cryogenians
)
(
geology
) The Cryogenian period.
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