Read Edit View history 一氧化二氮 yīyǎnghuà'èrdàn nitrous oxide Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 一氧化二氮 yīyǎnghuà'èrdàn nitrous oxide nitrous oxide (N2O) or laughing gas Edit Delete References Add reference No references for this word.