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Meaning of black aurora | Babel Free

Noun CEFR B2

Definitions

A structure that is embedded in a uniformly bright aurora, where its optical emission is significantly reduced, presenting as either patches or arcs that mainly drift eastwards.

CEFR level

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

black babies black bag black bag job black bag operation black bamboo black band disease

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