introductory
adj.serving as a start or a first step to something. You use this to describe things like a first lesson or a special low price for new customers.
adj.serving as an introduction to a subject or activity; preliminary. Often describes materials or offers intended for beginners or first-time users.
“The college offers an introductory course in psychology.”
“New members can take advantage of an introductory rate for the first six months of their subscription.”
“The author's introductory remarks provided the necessary historical context for the complex political theories discussed in the subsequent chapters.”
Typically used attributively before a noun. Frequently pairs with nouns like 'offer', 'price', 'course', or 'chapter'.
“An important thing to take into account, especially when going to open days and introductory meetings, is what kind of educational project the school follows.”
Borrowed from Late Latin intrōductōrius, from Latin intrōductus.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.