Primary products or 'raw materials' are often refined into more expensive secondary products.

It is also found in wine as a secondary product of alcoholic fermentation.

It was mined both as a primary and secondary product at surface and underground mines.

Naptha and gas oil, secondary products, were also stored in the refinery area.

In addition to its primary print edition, the newspaper publishes several secondary products.

If only Intel could somehow come up with $300 million to invest in the development of secondary products like this, things would all work out.

It is important because the resulting aldehydes are easily converted into many secondary products.

Certain desirable secondary products called cogeners, or flavourings, are collected with the alcohol.

A by-product is a secondary product derived from a manufacturing process or chemical reaction.

Almost all down commercially available is a secondary product of geese raised for consumption.