poison gas poison dogwood • poison hemlock · · · Info · Definitions · Characters · · poison gas · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (noun) a gas that is poisonous to breath or contact; used in chemical warfare. Synonyms: poison gas. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 g latin small letter g U+0067 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073