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. 镇静剂 They use opium as a sedative, rather than as a narcotic. 他们把鸦片作为镇静剂，而不是作为麻醉剂。 返回 sedative剑桥词典a drug used to calm a person or animal or to make them sleep 镇静药；镇静剂 返回 sedative