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Meaning of passive iron | Babel Free

Noun CEFR B2

Definitions

Iron that has been subjected to the action of heat, strong nitric acid, chlorine, etc. It is then not easily acted upon by acids.

uncountable

CEFR level

B2

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

See also

passive learning passive matrix passive participle passive photolocation passive radar passive resistance