← Back to search

Meaning of sludge acid | Babel Free

Noun CEFR B2

Definitions

Impure dark-coloured sulphuric acid that has been used in the refining of petroleum.

uncountable

CEFR level

B2

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

See also

sludge hole sludge metal sludgecore sludgemaker sludger Sludges