By-product

By-product

By-product (/ˈbʌɪˌprɒdʌkt/) is a secondary or incidental product derived from a manufacturing process or chemical reaction. It is not the primary product or service being produced.

Etymology

The term "by-product" has its origins in the mid-19th century. It is a combination of the words "by" and "product", where "by" means "side" and "product" refers to a thing that is produced.

Related Terms

• Primary product: The main product that is produced in a manufacturing process or chemical reaction.
• Co-product: A product that is produced along with the primary product during a manufacturing process or chemical reaction.
• Waste product: A product that is not wanted or is surplus to requirements in a manufacturing process or chemical reaction.
• Product (chemistry): In chemistry, a product is a substance that is formed as the result of a chemical reaction.

See Also

• Chemical reaction
• Manufacturing
• Chemical process engineering
• Industrial process

External links

• Medical encyclopedia article on By-product
• Wikipedia's article - By-product

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