Which to use
“mm” is a symbol and “Mx” is a name - they look or sound alike but fill different roles in a sentence.
- #1,092
- “mm” frequency rank
- #33,795
- “Mx” frequency rank
- 34887
- confusion score
Side-by-Side Comparison
| Feature | mm | Mx |
|---|---|---|
| Definition | Symbole du millimètre, unité de mesure de longueur du Système international (SI), valant 0,001 mètre (10⁻³ mètre). | Les Moulineaux. |
Where the eye mixes mm and Mx
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between mm and Mx
These two trip readers on the page rather than in the ear: mm is \mi.li.mɛtʁ\ while Mx is \mu.li.no\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - m in “mm” becomes x in “Mx”, and the parts of speech differ too (symbol vs name), which is usually the fastest check. Our composite confusion score for this pair is 34887, derived from the frequency rank of both members and their visual similarity.
mm is recorded at frequency rank #1,092, classified as asymbol, pronounced \mi.li.mɛtʁ\. Mx is at rank #33,795, tagged as aname, pronounced \mu.li.no\.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 34887, this pair ranks #280,668 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of mm vs Mx
Shared letters: m. Private to "mm": -. Private to "Mx": x.
"mm" · 2 letters · shape CC · "Mx" · 2 letters · shape CC
Frequently Asked Questions
Is swapping "mm" for "Mx" ever safe?
Frequency check: "mm" vs "Mx" - which ranks higher?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "mm" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Mx" - compare definitions side by side with the headword page. Word entry
- This pair ranks #280,668 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "mm" and "Mx" also get mixed up with nearby pairs, the highest-scored neighbour is "MWh vs Mx". Nearby pair
Confusion rank #280,668 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.