gaseous
adjective/ˈɡæsiəs/, /ˈɡeɪsiəs/
/ˈɡæsiəs/, /ˈɡæʃəs/
[usually before noun]- like or containing gas
- a gaseous mixture
- in gaseous form
Oxford Collocations DictionaryGaseous is used with these nouns:- emission
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gaseous