甲基安非他明 jiǎjī'ānfēitāmíng methamphetamine Origin Definitions Defs Strokes Stroke Words Sentences Sents 甲基 jiǎjī methyl the methyl group in chemistry安非他明 ānfēitāmíng amphetamine (loanword) amphetamine; a stimulant drug for the central nervous system. Known in Taiwan as 安非他命 ānfēitāmìng or 安公子 āngōngzǐ.