Standard Lemma guide

polymyxin

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

any of several toxic antibiotics obtained from a particular soil bacterium

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: antibiotic, antibiotic drug

History

Etymology

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

Across languages

Translations

5 source translations are retained for this English entry.

  • Chinese Mandarin: 多黏菌素 (duōniánjūnsù) — any of several toxic antibiotics
  • Finnish: polymyksiini — any of several toxic antibiotics
  • Japanese: ポリミキシン (porimikishin) — any of several toxic antibiotics
  • Korean: 폴리믹신 (pollimiksin) — any of several toxic antibiotics
  • Romanian: polimixină — any of several toxic antibiotics