Additive
# Additive

Additive may refer to:

## Mathematics

* Additive function, a function in number theory
* Additive map, a function that preserves the addition operation
* Additive set-function see Sigma additivity
* Additive category, a preadditive category with finite biproducts
* Additive inverse, an arithmetic concept

## Science

* Additive color, as opposed to subtractive color
* Additive model, a statistical regression model
* Additive synthesis, an audio synthesis technique
* Additive genetic effects
* Additive quantity, a physical quantity that is additive for subsystems; see Intensive and extensive properties

## Engineering

* Feed additive
* Gasoline additive, a substance used to improve the performance of a fuel, lower emissions or clean the engine
* Oil additive, a substance used to improve the performance of a lubricant
* Weakly additive, the quality of preferences in some logistics problems
* Polymer additive
* Pit additive, a material aiming to reduce fecal sludge build-up and control odor in pit latrines, septic tanks and wastewater treatment plants
* Biodegradable additives

## Other uses

* Additive case [et], one of the grammatical cases in Estonian
* Food additive, any substance added to food to improve flavor, appearance, shelf life, etc.
* Additive rhythm, a larger period of time constructed from smaller ones
