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additive

noun [C]
 
 
/ˈæd.ɪ.tɪv/ US  /-ə.t̬ɪv/

Definition

a substance that is added to food in order to improve its taste or appearance or to keep it fresh and stop it from decaying: food additives This margarine is full of additives - just look at the label!Additives in food and drinks
(Definition of additive noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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