Etymologically

codex

Etymology and origin of the Latin word codex

Confidence
Established
Formation
Derivation
First attested
Plautus
Inherited from
Proto-Italic *kaud-ek-
Ultimate origin
Proto-Indo-European (*keh₂u-d-)

Pronunciation

  • IPA (Classical): [ˈkoː.dɛks][1]
  • IPA (Ecclesiastical): [ˈkɔː.deks][1]

Forms

cōdex m (genitive cōdicis); third declension[1]

Etymology

It is a later form of caudex “tree trunk”, with the rustic change of /au/ to /ō/.[2][1][3] Caudex is inherited from Proto-Italic *kaud-ek-, probably derived from cauda “tail”.[2][4]

Earliest recorded meaning

Georges finds it in Plautus (c. 250–184 BC) for the wooden block to which slaves were chained.[3][5]

Semantic evolution

Its first sense, shared with caudex, was a tree trunk or a block of wood, the block to which a slave was chained, and as an insult a blockhead, as in Petronius.[3][5] It came to mean a writing tablet, a book or notebook, and a register, as in Cicero.[5][1]

De Vaan notes that codex is the form always used of books.[2] In late antiquity it was a code of laws, as the Codex Theodosianus and Codex Iustinianus.[5] English code came from it through Old French, and codex, “manuscript volume”, was borrowed in 1845.[6]

Timeline

  • c. 250–184 BC – Plautus uses it of a slave's block.[3][5]
  • 81–43 BC – Cicero uses it of a register.[5][7]
  • c. 75–c. 150 AD – Suetonius mentions a will written in two books.[5][7]
  • 528–534 AD – The Code of Justinian is compiled.[5][7]
  • 1845 – English codex is borrowed.[6]

Meanings

Noun

  1. A tree trunk; a block of wood (to which slaves were chained).[3][1]
  2. (insult) A blockhead.[3]
  3. A book, notebook; writing tablets.[5][1]
  4. A register.[5]
  5. (Late Latin) A code of laws.[5]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c d e f Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  4. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  5. ^ a b c d e f g h i j k Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  6. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de

Related etymologies

  • decido · also from Proto-Italic
  • eligo · also from Proto-Italic
  • surgo · also from Proto-Italic
  • iaceo · also from Proto-Italic
  • votum · also from Proto-Italic
  • voco · also from Proto-Italic
  • studium · also from Proto-Italic
  • sonus · also from Proto-Italic
Cite this entry

“Codex.” Etymologically, 15 Oct. 2026, etymologically.com/la/codex. Accessed 15 Oct. 2026.

Last edited on . ·