# polymyxin

> English word · Noun

## Definitions
1. Any of several toxic antibiotics, derived from the soil bacterium Bacillus polymyxa, used to treat infections by gram-negative bacteria

## Etymology
From translingual polymyxa + -in, from Bacillus polymyxa, from which the antibiotic was isolated.

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