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Meaning of Boring Billion | Babel Free

Noun CEFR B2

Definitions

The period of time from 1.8 Gya to 800 Mya, on Earth, lying in the middle of the Proterozoic.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
See all B2 English words →

See also

boring clam boring, dull Boringly Boringness borinic acid borinine

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