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Meaning of Tonian | Babel Free

Adjective CEFR B1
/ˈtəʊ.ni.ən/

Definitions

Of a geologic period within the Neoproterozoic era from about 1000 to 850 million years ago.

not-comparable

CEFR level

B1
Intermediate
This word is part of the CEFR B1 vocabulary — intermediate level.

See also

tonic tonical tonicoclonic tonier toniest tonified

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