supplementary
supp·le·men·tary
adjective
1.
added to complete or make up a deficiency
- “produced supplementary volumes”
- “additional reading”
2.
functioning in a subsidiary or supporting capacity
- “the main library and its auxiliary branches”
Origin
From supplement + -ary; compare French supplémentaire.
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.