auto-injector
noun [ C ] (also autoinjector) uk/ˌɔː.təʊ.ɪnˈdʒek.tər/ us/ˌɑː.t̬oʊ.ɪnˈdʒek.tɚ/
药品自动注射器
a device used for injecting a single dose (= measured amount) of a drug into your own or another person's body
If the autoinjector is pulled away from the skin before the injection is completed, a full dose may not be administered. 如果在注射完成前将药品自动注射器从体表抽离，注射入体内的可能不是完整的剂量。