# by-product

> English word · Noun

## Definitions
1. Something made incidentally during the production of something else.
2. A consequence, especially a side effect.

## Etymology
From by- + product.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/by-product