by-product /'baiprodAkt; 'baizpradakt/ n [C] substance obtained during the manufacture of some other substance: (制造某物時(shí)的) 湖產(chǎn)品： Ammonia, coal-tar and coke are valuable ~s obtained in the manufacture of coal-gas. 阿摩尼亞、煤焦油和焦炭都是制造煤氣時(shí)的幣: 要副產(chǎn)品。