protreptic
Serving to instruct; didactic.
A protreptic discourse for beginners, no matter what the stage of Plato's development when he wrote it, would contain much elementary matter and would certainly not reveal his most profound thought.
Where it comes from
Borrowed from Ancient Greek προτρεπτικός (protreptikós, “hortatory”), from προτρέπω (protrépō, “to urge on”).
Adapted from the Wiktionary entry protreptic (CC BY-SA 4.0).