Difference between Byproduct and By-product

What is the difference between Byproduct and By-product?

Byproduct as a noun is a secondary or additional product; something produced, as in the course of a manufacture, in addition to the principal product. while By-product as a noun is a secondary product; something made incidentally during the production of something else.

We hope you now know whether to use Byproduct or By-product in your sentence.