柯林斯詞典alkaloid /??lk??l??d/ 1. N any of a group of nitrogenous basic compounds found in plants, typically insoluble in water and physiologically active. Common examples are morphine, strychnine, quinine, nicotine, and caffeine 植物堿基 返回 alkaloid劍橋詞典a type of chemical found in plants that often acts as a drug or poison , or is used in medicines 生物堿（植物中的化學(xué)物質(zhì)，常用于制藥或作為毒物） Morphine and cocaine are powerful alkaloids. 嗎啡和可卡因是強力的生物堿。 返回 alkaloid