Etymologically

millimètre

Etymology and origin of the French word millimètre

Confidence
Established
Formation
Compound
First attested
1792 report of Borda, Lagrange, Condorcet and Laplace to the Académie des sciences More words from the 18th century
Ultimate origins
French milli-Proto-Indo-European *meh₁-
Etymology tree
inherited borrowed derived
Ancient Greek μέτρον (métron)
Latin metrum
French mètre
English meter
German Meter
Italian metro
Romanian metru
Spanish metro
French millimètre
English millimeter
From the same root
Ancient Greek μετρέω (metréō) ← μέτρον
Ancient Greek μετρικός (metrikós) ← μέτρον
Ancient Greek περίμετρος (perímetros) ← μέτρον
Ancient Greek σύμμετρος (súmmetros) ← μέτρον
English symmetry ← μέτρον
French kilomètre ← mètre
French métrique ← mètre
Italian centimetro ← metro

Pronunciation

  • /mi.li.mɛtʁ/[1]

Forms

millimètre m (plural millimètres)[1]

Etymology

It is a compound from French milli- + mètre, made for the metric system.[2][3][4][5][1] Littré points out that milli- here takes mille in the reversed sense “thousandth”.[6]

Earliest recorded meaning

It is first found in 1792, in the report of Borda, Lagrange, Condorcet and Laplace to the Académie des sciences, as the thousandth part of the mètre1.[2]

Semantic evolution

In 1795 Prieur de la Côte-d'Or's note on weights and measures proposed déci-, centi- and, if needed, milli- for submultiples, but the compounds in milli- were left out of the law of 7 April 1795.[2] The Grand Robert, the Petit Robert and the GLLF date the word from 1795, the GLLF from the Bulletin des lois.[3][4][5]

Millimètre carré and millimètre cube are recorded by Larousse in 1874, and millimètre de mercure, a unit of pressure, by the Robert in 1959.[5] The adjectives millimétré and millimétrique describe graph paper ruled in millimetres.[2]

Timeline

  • 1792 – Borda, Lagrange, Condorcet and Laplace use it in a report to the Académie des sciences.[2]
  • 1795 – The Bulletin des lois records it.[5]
  • 1874 – Larousse records millimètre carré and millimètre cube.[5]
  • 1959 – The Robert records millimètre de mercure.[5]

Meanings

Noun

  1. A millimetre, the thousandth part of a mètre1 (symbol mm): mesurer au millimètre près.[4][2][1]
  2. Millimètre carré, millimètre cube: units of area and volume based on the millimetre.[5][2]
  3. Millimètre de mercure: a unit of pressure.[5][4]
  4. The width of a cinema film: un film en seize millimètres.[4]

Word family

  • millimétré
  • millimétrique

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Trésor de la langue française informatisé (2004), ATILF – CNRS & Université de Lorraine, atilf.fr/tlfi; electronic version of Imbs, Paul; Quemada, Bernard, eds. (1971–1994), Trésor de la langue française, Paris: CNRS / Gallimard
  3. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  4. ^ a b c d e Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  5. ^ a b c d e f g h Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  6. ^ Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
Cite this entry

“Millimètre.” Etymologically, 14 Nov. 2026, etymologically.com/fr/millim%C3%A8tre. Accessed 15 Nov. 2026.

Last edited on . ·