柯林斯词典sedative /ˈsɛdətɪv/ (sedatives) 1. N-COUNT A sedative is a medicine or drug that calms you or makes you sleep. 鎮靜劑 They use opium as a sedative, rather than as a narcotic. 他們把鴉片作爲鎮靜劑，而不是作爲麻醉劑。 返回 sedative剑桥词典a drug used to calm a person or animal or to make them sleep 鎮靜葯；鎮靜劑 返回 sedative