phosphine

\fɔs.fin\

/\fɔs.fin\/ noun

The verdict

“phosphine” is uncommon French (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency French
9
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Gaz toxique légèrement plus lourd que l’air, de formule brute PH₃ ; il est utilisé comme agent insecticide de fumigation.

Corpus desk

Index FR-phosphine · phosphine · French

phosphine · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 9 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "P" thin
  • PHOTO-UNK Peer pending

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for phosphine
PropertyValue
Headwordphosphine
LanguageFrench
Part of speechNoun
IPA\fɔs.fin\
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « phosphine » en français

phosphinen'entre pas dans le top 100.000 du français: zone de termes techniques, archaïques ou rares.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

phosphine is uncommon French outside the top frequency list, classed as anoun, transcribed \fɔs.fin\. Rarity is why readers land here mid-draft. Gloss: "Gaz toxique légèrement plus lourd que l’air, de formule brute PH₃ ; il est utilisé comme agent insecticide de fumigation.".

No misspelling variants are generated for phosphine in our index, a straightforward case of a spelling with little room for common typos. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.

This entry carries no recorded etymology, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct French form is phosphine, spelled P-H-O-S-P-H-I-N-E.

Definition

  1. 1
    Gaz toxique légèrement plus lourd que l’air, de formule brute PH₃ ; il est utilisé comme agent insecticide de fumigation.

Recorded use

Wiktionary examples

These source excerpts show how phosphine appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Aucune molécule isolée, a fortiori simple, ne peut être attribuée de manière certaine à une action biologique. Pour preuve, la phosphine est détectée depuis longtemps dans deux planètes géantes (Jupiter et Saturne) mais aussi dans une enveloppe circumstellaire, sans que l’on puisse préciser les mécanismes détaillés de sa formation.
  2. L’étude de la Pre Jane Greaves, de l'université britannique de Cardiff avait fait la une en rapportant la "présence apparente" de phosphine sur Vénus.— (AFP, « Controverse sur la présence potentielle de vie dans l'atmosphère de Vénus », Radio-Canada.ca, 4 décembre 2020)

Synonyms

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "phosphine"?
"phosphine" is spelled P-H-O-S-P-H-I-N-E. The IPA pronunciation is \fɔs.fin\.
What does "phosphine" mean?
As a noun, "phosphine" means: Gaz toxique légèrement plus lourd que l’air, de formule brute PH₃ ; il est utilisé comme agent insecticide de fumigation.
How do you pronounce "phosphine"?
The IPA (International Phonetic Alphabet) transcription for "phosphine" is \fɔs.fin\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "phosphine" come from?
"phosphine" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list