- serving or used to introduce; preliminary; beginning: an introductory course; an introductory paragraph.
Origin of introductory
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- serving as an introduction; preliminary; prefatory
Word Origin and History for introductive
c.1600, from Late Latin introductorius, from introduct-, past participle stem of introducere "to lead in, bring in" (see introduction). Also used in English from c.1400 as a noun meaning "introductory treatise or textbook."
Online Etymology Dictionary, © 2010 Douglas Harper