substance active

noun

The verdict

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

Unranked
below top-frequency French
16
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.

Corpus desk

Index FR-substance-active · substance active · French

substance active · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 16 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "S" 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 substance active
PropertyValue
Headwordsubstance active
LanguageFrench
Part of speechNoun
Letters16
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « substance active » en français

substance activereste hors des 100.000 mots français les plus fréquents, dans la longue queue du vocabulaire technique, archaïque ou rare, là où le doute d'orthographe frappe.

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

Rare enough to double-check

substance active is uncommon French outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.".

We couldn't generate a plausible misspelling set for substance active, a sign its spelling follows regular French conventions. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

No explicit etymology string is stored for this entry, so its spelling is best read as a straightforward mapping from sound to letter. The correct French form is substance active, spelled S-U-B-S-T-A-N-C-E- -A-C-T-I-V-E.

Definition

  1. 1
    Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.

Recorded use

Wiktionary example

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

  1. Les États membres devraient se prononcer cette semaine pour ou contre le renouvellement de la benfluraline, une substance active herbicide incontournable sur plusieurs cultures telle que les chicorées (endive et boisson).

Synonyms

Antonyms

This word in other languages

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 "substance active"?
"substance active" is spelled S-U-B-S-T-A-N-C-E- -A-C-T-I-V-E.
What does "substance active" mean?
As a noun, "substance active" means: Substance qui dans un médicament possède un effet thérapeutique recherché et qui est présente la plupart du temps, en très faible proportion par rapport aux excipients.
What language does "substance active" come from?
"substance active" is a French word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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