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Meaning of Actonian | Babel Free

Noun CEFR B2

/ækˈtəʊ.ni.ən/

Definitions

A stratigraphic age, a subdivision of the Middle Ordivician, from 454 Ma to 453 Ma.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

actopaxin actophorin actophotometer actor actorfic actorine