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

plural of additivity

(mathematics, nonstandard) additivity

as well as; besides

(music) The practice of enlarging and revising the orchestration of an earlier work, usually a Baroque piece, to accommodate the larger contemporary orchestras and tastes of the time.

plural of additional accompaniment

(sports) stoppage time

(mathematics) An operation, written using the symbol +, that produces the sum of two operands

(algebra) An element of an algebraic structure, generally denoted 0, which is an identity for an additive operation (generally denoted +). That is, x + 0 = 0 + x = x for any x in the structure.

(chemistry) a reaction in which radicals are added to both sides of a double or triple bond