This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of, relating to, or constituting an introduction.

adj. Serving to introduce. See Synonyms at preliminary.

adj. introducing; giving a preview or idea of

adj. Serving to introduce something else; leading to the main subject or business; preliminary; prefatory

Serving to introduce something; prefatory; preliminary: as, introductory remarks.

Synonyms Preparatory, etc. (see preliminary); precursory, proëmial.

n. An introduction; a treatise giving the elements or simplest parts of a subject.

adj. serving as an introduction or preface

adj. serving as a base or starting point

adj. serving to open or begin

"(Many who answered the MMPI questionnaire were students in introductory psychology courses at four-year institutions.)"

preceding    first    opening   

preliminary    prefatory    initial    introductive    inductory    precursory    proemial    prodomal    initiary    intromissive   

forego    prefatory    lengthy    biographical    explanatory    concise    unpublished    preliminary    supplementary    autobiographical