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Meaning of Wratten number | Babel Free

Noun CEFR B2

Definitions

Any of the arbitrary alphanumeric codes in a system for labelling optical filters, usually for photographic use.

CEFR level

B2

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

See also

Wrawby wrawling Wraxall Wraxall and Failand wraxling Wray