noun🔗Share镇静剂,安定药 An agent or drug that sedates, having a calming or soothing effect, or inducing sleep."The doctor prescribed sedatives to help the anxious patient sleep better at night. "医生给这位焦虑的病人开了镇静药,帮助他晚上睡得更好。medicinesubstancebodymindChat with AIVocabulary GamePractice Reading