1. a secondary or incidental product made in the manufacture or synthesis of something else

Examples

• The chemical reaction produced the desired compound along with several subproducts.
• Sawdust is a common subproduct of lumber mills.
• The pharmaceutical company found a profitable use for what was originally just a subproduct.
• During oil refining, various subproducts are separated and processed.
• The manufacturing process was optimized to minimize unwanted subproducts.
• Some subproducts can be more valuable than the original target material.