PREFATORY
Meaning of PREFATORY in English
/ ˈprefətri; NAmE -tɔːri/ adjective
[ only before noun ] ( formal ) acting as a preface or an introduction to sth :
a prefatory note
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005