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.
Pertaining to chemical addition.
Pertaining to addition; that can be, or has been, added.
That is distributive over addition.
Whose operator is identified as addition.
A substance added to another substance or product to produce specific properties in the combined substance.
A word or phrase that adds something, such as also, even, or nor.