Etymologically

Etymology and origin of the French word biseau

Confidence
Disputed
Formation
Derivation
First attested
1451 More words from the 15th century
Ultimate origin
Occitan biais
Etymology tree
inherited borrowed derived
French biais
French biseau
From the same root
English unbiased ← biais

Pronunciation

Forms

biseau m (plural biseaux)[1] 16th-century bizeau (plural bizeaulz).[2]

Etymology

The origin is uncertain.[3][4][5] Rey, the Grand Robert and the Petit Robert take it as probably from French biais, through an unrecorded form ⟨biaiseau⟩, pronounced ⟨bieseau⟩ after a shift of stress.[3][4][6] Meyer-Lübke also lists it as a derivative of that adjective, itself of unknown origin.[7]

Bloch and Wartburg and the GLLF see instead a derivative of the adverb bis2 (“twice”).[8][9] Picoche explains it as an alteration, under an unknown influence such as that of the learned prefix bis-, of Old French beseau, an old derivative of Latin bis, *bisellus.[10] Rey objects that a derivative of this adverb cannot be explained by its form, since the expected Romance outcome is ⟨bes⟩;[3] Guiraud, however, finds the sense so strongly in its favour that he posits a Gallo-Romance ⟨bis⟩, from an expressive *bīs with a lengthened vowel or from *biseus (“made of two parts”), with the French word going back to a diminutive ⟨*bisellus⟩.[3] Wiktionary proposes Old French *besel, perhaps from Vulgar Latin *bisalus (“stone with two sides”), from the same Latin adverb and āla.[1] Littré compares Spanish bisel.[2]

Earliest recorded meaning

It is first recorded in 1451, in goldsmiths' work, for a bezel cut on the slant to hold the enamel of a jewel.[3][4]

Semantic evolution

From the 16th century it was used of any edge cut on the slant, notably in en biseau “at an acute angle”.[3][4] Its technical uses in printing and joinery, recorded by Furetière in 1690, are narrowings of that general sense.[3]

The verb biseauter, first written bizotter (1743), means “to bevel”; card cheats used it from 1846 for marking the edge of cards with a secret sign.[3]

Timeline

  • 13th century – The date Bloch and Wartburg, the GLLF and Picoche give for the first record.[8][9][10]
  • 1451 – Recorded in goldsmiths' work.[3][4]
  • 16th century – Used of any edge cut on the slant.[3][4]
  • 1690 – Furetière records its uses in printing and joinery.[3]
  • 1743 – The verb bizotter, later biseauter, appears.[3][8]
  • 1846 – Biseauter is used for marking playing cards.[3]
  • 1863 – Biseautage is recorded.[8]

Meanings

Noun

  1. A bevel, an edge cut on the slant;[6][11][5] en biseau, at an angle: un plateau de verre taillé en biseau.[6][11][5]
  2. A tool whose cutting edge is bevelled, such as a chisel.[6][5][2]
  3. (music) The bevelled piece in the mouthpiece of some wind instruments or at the mouth of an organ pipe.[6][11]
  4. (printing) A wooden strip bevelled on one side to take the wedges that lock the type in the forme.[11][5]
  5. (jewellery) A facet of a brilliant next to the table.[11][5]

Word family

  • biseauter
  • biseautage
  • ébiseler

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  3. ^ a b c d e f g h i j k l m Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  4. ^ a b c d e f Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  5. ^ a b c d e f Académie française (1992–2024), Dictionnaire de l'Académie française, 9th ed., Paris: Académie française / Fayard / Imprimerie nationale
  6. ^ a b c d e Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
  7. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  8. ^ a b c d Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  9. ^ a b Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  10. ^ a b Picoche, Jacqueline (1991), Dictionnaire étymologique du français, Paris: Le Robert (Les Usuels du Robert)
  11. ^ a b c d e 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
Cite this entry

“Biseau.” Etymologically, 15 Nov. 2026, etymologically.com/fr/biseau. Accessed 15 Nov. 2026.

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