Definition: Exclusive by-product
An exclusive by-product is a product technologically linked to the production of other products in the same group, but which is not produced in any other group (for example, molasses linked to the production of sugar). Exclusive by-products are used as inputs for the manufacture of other products.
Eurostat, "NACE Rev. 2, Statistical Classification of Economic Activities in the European Community",Office for Official Publications of the European Communities, Luxembourg, 2008