Standard Lemma guide

fos-

prefix · 1 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /fɒs/
  • Received-Pronunciation: /fəs/
  • General-American: /fɑs/
  • General-American: /fəs/

1

prefix

Meaning 1

Used to form names of phosphorous derivatives of various pharmacological categories.

Definition source: English Wiktionary via Wiktextract

Usage: morpheme

Topics: medicine, pharmacology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From phosphorus.