additive

/ˈædɪtɪv/
noun
  1. A substance added to something in small amounts to improve or preserve it.
    • Many processed foods contain artificial additives to enhance flavor.
    • The paint contains a special additive to prevent rust.
    • This gasoline has an additive that helps clean the engine.
Synonyms
adjective
  1. Characterized by addition; involving the addition of something.
    • The scientist studied the additive properties of the new chemical compound.
    • The additive process in manufacturing involves combining separate components.
    • In this game, each move has an additive effect on your total score.
Antonyms
What does "additive" mean? | whatsthatwordmean | whatsthatwordmean