(uncountable) The property of being additive / (countable) The extent to which something is additive

plural of additivity

(mathematics, nonstandard) additivity

plural of additional

(mathematics) Pertaining to addition; that can be, or has been, added. / (mathematics, of a function, etc.) That is distributive over addition.

A substance added to another substance or product to produce specific properties in the combined substance. / (grammar) A word or phrase that adds something, such as also, even, or nor.

Something added.

(conjunctive, idiomatic) Also; as well; besides.

plural of addition

plural of additive