mth

symbol

The verdict

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

Unranked
below top-frequency French
3
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Symbole de la millithermie, unité de mesure d’énergie.

Corpus desk

Index FR-mth · mth · French

mth · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 3 letters
  • VOW-0 0 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "M" 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 mth
PropertyValue
Headwordmth
LanguageFrench
Part of speechSymbol
Letters3
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « mth » en français

mthreste 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

mth is uncommon French outside the top frequency list, classed as asymbol. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for mth, a sign its spelling follows regular French conventions. We don't track a confusable pairing for this entry, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

This headword's origin isn't recorded in our source data, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct French form is mth, spelled M-T-H.

Definition

  1. 1
    Symbole de la millithermie, unité de mesure d’énergie.
  2. 2
    Code ISO 639-3 du munggui.

Recorded use

Wiktionary example

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

  1. 1 mth = 4,1868 kJ (exactement)

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 "mth"?
"mth" is spelled M-T-H.
What does "mth" mean?
As a symbol, "mth" means: Symbole de la millithermie, unité de mesure d’énergie.
What language does "mth" come from?
"mth" is a French word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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