1. didactical - Adjective
2. didactical - Adjective Satellite
Fitted or intended to teach; conveying instruction; preceptive; instructive; teaching some moral lesson; as, didactic essays.
Source: Webster's dictionaryBut Einstein’s model is certainly good for didactical purposes because – in science it is important that proposed model gives testable prediction, that this prediction is tested and it is confirmed. Source: Internet
Still, their artificial character made it clear that they were constructed for didactical purposes. Source: Internet