tran·quil·iz·er also Brit tran·quil·lis·er 
/ˈtræŋkwəˌlaɪzɚ/ noun
plural tran·quil·iz·ers /ˈtræŋkwəˌlaɪzɚ/ noun [count] : a drug that causes a person or animal to become very relaxed and calm
▪ a patient who is on/taking tranquilizers ▪ They shot the bear with a tranquilizer gun. [=a gun that shoots a dart which contains a drug that causes a wild animal to become very relaxed and unable to move]
▪ a patient who is on/taking tranquilizers ▪ They shot the bear with a tranquilizer gun. [=a gun that shoots a dart which contains a drug that causes a wild animal to become very relaxed and unable to move]
