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Meaning of coal rank | Babel Free

Noun CEFR B2

Definitions

The measure or degree of the progressive coalification (organic metamorphism) of a coal, often expressed in terms of vitrinite reflectance.

countable, uncountable

CEFR level

B2

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

See also

coal roller coal scuttle coal scuttle helmet coal seam coal tar coal tit