# phosphorous

> English word · Adjective · frequency rank #52,551

## Definitions
1. Of or pertaining to phosphorus.
2. Resembling phosphorus.
3. Of, relating to, or containing trivalent phosphorus.

## Etymology
From phosphorus + -ous.

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