The word "supplementary" means something that adds to or enhances something else. It provides extra information, support, or complements another thing. Full definition
An extra in itself, the disc sports nothing in the way of supplementary material. (filmfreakcentral.net)
Risk reductions in men, based on a single exposure assessment, were more modest or were non-existent (see supplementary tables C and D). (bmj.com)
We review almost every piece of supplementary information candidates give us, including portfolios, websites, blogs and online resumes of every kind. (freeresumebuilder.org)