Didactic

daɪˈdæktɪk

adjective

intended to teach, particularly in having moral instruction as an ulterior motive

The word 'didactic' comes from the Greek word 'didaktikos', meaning 'apt at teaching'. It is often used to describe something that is educational or morally instructive in nature.

She sent this didactic gem to several markets, but it found no purchaser; and she was inclined to agree with Mr. Dashwood, that morals didn’t sell.

Louisa May Alcott

Little Women

The question is this: Monsieur the Principal thinks that my thesis ought to be dogmatic and didactic.” “Your thesis!

Alexandre Dumas

The Three Musketeers

What additional didactic counsels did he similarly repress?

James Joyce

Ulysses

He lost his way in long passages for some six or eight minutes: till he heard the high-pitched, didactic voice of the doctor, and then the dull voice of the priest, followed by general laughter.

G. K. Chesterton

The Innocence of Father Brown

He sat gazing in clammy want at her full red lips and dimpled cheeks as he listened to Major Danby describe in a monotonous, didactic male drone the heavy concentrations of flak awaiting them at Avignon, and he moaned in deep despair suddenly at the thought that he might never see again this lovely woman to whom he had never spoken a word and whom he now loved so pathetically.

Heller, Joseph

Catch-22