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Encyclopedia
Additive may refer to:
In mathematics the term additive function has two different definitions, depending on the specific field of application.In algebra an additive function is a function that preserves the addition operation:for any two elements x and y in the domain. For example, any linear map is additive...

, a function that preserves the addition operation
In mathematics, the additive inverse, or opposite, of a number a is the number that, when added to a, yields zero.The additive inverse of a is denoted −a....

, an arithmetic concept
In mathematics, specifically in category theory, an additive category is a preadditive category C such that all finite collections of objects A1,...,An of C have a biproduct A1 ⊕ ⋯ ⊕ An in C....

, a preadditive category with finite biproducts
In music, additive and divisive are terms used to distinguish two types of both rhythm and meter.A divisive rhythm is a rhythm in which a larger period of time is divided into smaller rhythmic units or, conversely, some integer unit is regularly multiplied into larger, equal units; this can be...

, a larger period of time constructed from smaller ones
Additive synthesis is a technique of sound synthesis that creates musical timbre by explicitly adding sinusoidal overtones together.The timbre of an instrument is composed of multiple harmonic or inharmonic partials , of different frequencies and amplitudes, that change over time...

, an audio synthesis technique
An additive color model involves light emitted directly from a source or illuminant of some sort. The additive reproduction process usually uses red, green and blue light to produce the other colors. Combining one of these additive primary colors with another in equal amounts produces the...

, as opposed to subtractive color
• Additivity, in biochemistry, the simple sum of effects due to multiple causes
Food additives are substances added to food to preserve flavor or enhance its taste and appearance.Some additives have been used for centuries; for example, preserving food by pickling , salting, as with bacon, preserving sweets or using sulfur dioxide as in some wines...

, a substance added to food to improve flavor or appearance
A feed additive is a vitamin for farm animals that can't get enough nutrients from regular meals that the farmers provide. In some cases if an animal does not have some type of feed in its diet it may not grow properly...

Gasoline additives increase gasoline's octane rating or act as corrosion inhibitors or lubricants, thus allowing the use of higher compression ratios for greater efficiency and power, however some carry heavy environmental risks...

, a substance used to improve the performance of a fuel, lower emissions or clean the engine