Definition of additives:
(n) :
A substance added to another substance or product to produce specific properties in the combined substance.
(adj) :
(mathematics) Pertaining to addition; that can be, or has been, added.
(adj) :
(mathematics, of a function, etc.) That is distributive over addition.
(adj) :
(chemistry) Pertaining to chemical addition.
(adj) :
(genetics) Of or pertaining to genes (or the interaction etc. of such genes) which govern the same trait and whose effects work together on the phenotype.
(adj) :
(group theory, of a group, semigroup, etc.) Whose operator is identified as addition.