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, 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