gas helmet gas heater • gasherbrum · · · Info · Definitions · Synonyms · Characters · · gas helmet · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (noun) a protective mask with a filter; protects the face and lungs against poisonous gases. Synonyms: gasmask, respirator, gas helmet. · · Noun Definition 1 Synonyms · · · gasmask · · Synonym 1 respirator · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 l latin small letter l U+006C m latin small letter m U+006D s latin small letter s U+0073 t latin small letter t U+0074