prefatory

形容词 prefatory:

1. serving as an introduction or preface
   同义词：introductory, prefatorial

pref.a.to.ry

adj.Abbr. pref.（形容词）缩写 pref.
Of, relating to, or constituting a preface; introductory.See Synonyms at preliminary
序言的，开场白的：序言的、与序言有关的或组成序言的；开场白的参见 preliminary

来源：
From Latin praef3tus [past participle of] praef3ro [to say before] * see preface
源自 拉丁语 praef3tus [] praef3ro的过去分词 [先于…说] *参见 preface

【引伸】
pref.ato.rily
adv.（副词）