脱氧麻黄碱 tuōyǎngmáhuángjiǎn methamphetamine Origin Definitions Defs Strokes Stroke Words Sentences Sents 脱氧 脫氧 tuōyǎng deoxidation to remove oxygen atoms from organic compounds in a chemical or biochemical process麻黄碱 麻黃鹼 máhuángjiǎn ephedrine an alkaloid used in medicine, especially for the treatment of asthma and hay fever