IPA: //sʌbˈprɒdʌkt//
KK: /sʌbˈprɒdʌkt/
A product that is made during the process of creating something else, often considered secondary or less important than the main product.
The factory produces several subproducts that can be sold separately.
Subproduct → It is formed from "sub-" (meaning under or below) and "product" (from Latin "productus", meaning brought forth or produced). The word "subproduct" refers to a product that is produced as a secondary result or byproduct of a primary process.
Think of something that is produced "under" the main product — that's why a subproduct is a secondary result of a primary production process.