a powerful tranquilizer, CHClFNO, used in treating schizophrenia, Tourette's syndrome, nausea, etc.
See haloperidol in American Heritage Dictionary 4
(hălˌō-pĕrˈĭ-dôlˌ, -dŏlˌ, -dōlˌ)
noun
A tranquilizer, C21H23ClFNO2, used especially in the treatment of psychotic disorders, including schizophrenia, and also in the management of Tourette's syndrome.