笑気 しょうき Meanings Noun laughing gas; nitrous oxide See also: 亜酸化窒素 (あさんかちっそ). Kanji 笑 laugh. Read as ショウ. 気 spirit. Read as キ. Words containing 笑気 笑気麻酔 (しょうきますい) nitrous oxide anesthesia Jinuma: Japanese Dictionary · Word lists