Didactic /(?)/

Di·dac·tic

Didactic

a.
  1. Fitted or intended to teach; conveying instruction; preceptive; instructive; teaching some moral lesson; as, didactic essays.
    The finest didactic poem in any language.
  2. excessively prone to instruct, even those who do not wish to be instructed; -- of people. [Pejorative]

Syn. -- didactic.

Didactic

n.
  1. A treatise on teaching or education. [Obs.]