芥子气 Traditional form: 芥子氣 Pinyin (reading): jièzǐqì Definitions: mustard gas Characters: 芥 - mustard, broccoli 子 - son, child; seed, egg; fruit; small thing 气 - air, gas; steam, vapor; anger Traditional characters: 芥 - mustard, broccoli 子 - son, child; seed, egg; fruit; small thing 氣 - air, gas; steam, vapor; anger