thioridazine UK /ˌθʌɪ.ə(ʊ).ɹɪˈdeɪ.ziːn/US /ˌθaɪ.əˈɹɪd.əˌziːn/ noun1 •A synthetic compound derived from phenothiazine, used as a tranquillizer, chiefly in the treatment of mental illness. formsthioridazines
