Akademik

add-on
noun
1. a component that is added to something to improve it
-

the addition of a bathroom was a major improvement

-

the addition of cinnamon improved the flavor

Syn: ↑addition, ↑improver
Derivationally related forms: ↑improve (for: ↑improver), ↑add on, ↑add (for: ↑addition)
Hypernyms: ↑component, ↑constituent, ↑element
Hyponyms:
additive, ↑afterthought, ↑annex, ↑annexe, ↑extension, ↑wing, ↑attachment, ↑elongation
2. a supplementary component that improves capability
Syn: ↑accessory, ↑appurtenance, ↑supplement
Derivationally related forms:
add on, ↑supplementary (for: ↑supplement), ↑supplemental (for: ↑supplement), ↑supplement (for: ↑supplement), ↑appurtenant (for: ↑appurtenance), ↑appertain (for: ↑appurtenance), ↑accessory (for: ↑accessory), ↑accessorial (for: ↑accessory)
Hypernyms: ↑component, ↑constituent, ↑element
Hyponyms: ↑auto accessory, ↑computer accessory, ↑fitting, ↑fixings, ↑trimmings

Useful english dictionary. 2012.