supplemental
//ˌsʌp.lɪˈmen.təl//
Adjective
supplementalCanonical form
more supplementalComparative
most supplementalSuperlative
1
Serving to supplement or add to something; additional or extra.
The teacher provided supplemental materials for students who wanted to learn more.
2
Providing something that is missing or needed to complete or enhance something else.
The teacher provided supplemental materials to help students understand the difficult topic.