From Longman Dictionary of Contemporary Englishtranquillizertran‧quil‧lizer (also tranquilliser) British English, tranquilizer American English /ˈtræŋkwəlaɪzə $ -ər/ noun [countable] MDa drug used for making someone feel less anxious
Examples from the Corpus
tranquillizer• For the patient showing extreme distress, a tranquillizer may be indicated.• If I were my patient, she asked herself, would I prescribe myself a tranquillizer?• She had seen her general practitioner a week after the separation and he had prescribed a tranquillizer.• Each captive was injected with a tranquillizer.• Hofmeyr gave the elephant a small shot of tranquillizer.• Unfortunately, as the tranquillizer wears off so the plunger gradually slides back up and the former level of stress returns. 