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Meaning of hydrogen air | Babel Free

Noun CEFR B2

Definitions

A mixture of hydrogen and air used as fuel to a fuel cell.
uncountable
An early term for hydrogen; hydrogen gas.
obsolete, uncountable

CEFR level

B2

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

See also

hydrogen arsenide hydrogen balloon hydrogen bomb hydrogen bond hydrogen bromide hydrogen burning