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Meaning of Roman alum | Babel Free

Noun CEFR B2

Definitions

A cubical potassium alum formerly obtained in large quantities from Italian alunite, and highly valued by dyers on account of its freedom from iron.

uncountable

CEFR level

B2

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

See also

Roman balance Roman bath Roman baths Roman brick Roman Bridge Roman Britain