一氧化碳 Traditional form: 一氧化碳 Pinyin (reading): yīyǎnghuàtàn Definitions: carbon monoxide CO Characters: 一 - one; a, an; alone 氧 - oxygen 化 - to change, to convert, to reform; -ize 碳 - carbon Traditional characters: 一 - one; a, an; alone 氧 - oxygen 化 - to change, to convert, to reform; -ize 碳 - carbon