by-product

Definition

A secondary or incidental product made during the creation of another primary product.

हिन्दी एक प्राथमिक उत्पाद के निर्माण के दौरान बनाए गए एक द्वितीयक या अप्रत्यक्ष उत्पाद

Example

"Ethanol is a common by-product of sugar fermentation."