A by-product or byproduct is a secondary product derived from a production process, manufacturing process or chemical reaction; it is not the primary product or service being produced.

What is considered a byproduct?

When the process of making one thing results in a second product as well, that second thing is called a byproduct. Molasses, for example, is a byproduct of refining sugar. ... Sawdust is a byproduct of the lumber industry, and feathers are a byproduct of poultry processing.

What are 3 byproducts?

Byproducts (edible offal (including variety meats), inedible offal, hides and skins, blood, fats, and tallow) include all parts of a live animal that are not part of the dressed carcass and constitute about 30 percent of the liveweight of hogs and about 44 percent of the live- weight of cattle.