笑气 Traditional form: 笑氣 Pinyin (reading): xiàoqì Definitions: laughing gas (nitrous oxide) Characters: 笑 - to smile, to laugh; to giggle; to snicker 气 - air, gas; steam, vapor; anger Traditional characters: 笑 - to smile, to laugh; to giggle; to snicker 氣 - air, gas; steam, vapor; anger