Main Entry: phe·no·thi·azine

Pronunciation: \ˌfē-nō-ˈthī-ə-ˌzēn\

Function: noun

1 : a greenish yellow crystalline compound C₁₂H₉NS used as an anthelmintic and insecticide especially in veterinary practice—called also thiodiphenylamine
2 : any of various phenothiazine derivatives (as chlorpromazine) that are used as tranquilizing agents especially in the treatment of schizophrenia