orthopsychiatry Syllabification: (or·tho·psy·chi·a·try)Pronunciation: /ˌôrTHōˌsīˈkīətrē/Definition of orthopsychiatry noun the branch of psychiatry concerned with the study and prevention of mental or behavioral disorders, with emphasis on child development and family life. Derivatives orthopsychiatricPronunciation: /-ˌsīkēˈatrik/ adjective orthopsychiatristPronunciation: /-trist/ noun orthopsychiatry in other Oxford dictionaries Definition of orthopsychiatry in the British & World English dictionary