Etymologically

operculum

Etymology and origin of the Latin word operculum

Confidence
Established
Formation
Derivation
First attested
234–149 BC, Cato
Ultimate origin
Proto-Indo-European *h₂uer-i(e)-
Etymology tree
inherited borrowed derived
Latin operio
Latin operculum
From the same root
Latin adoperio ← operio
Latin opertum ← operio

Pronunciation

  • Classical: [ɔˈpɛr.kʊ.ɫũː][1]
  • Ecclesiastical: [oˈpɛr.ku.lum][1]

Forms

operculum n (genitive operculī); second declension[1]

Etymology

It is from Latin operiō (“to cover”) + -culum.[2][1][3][4] De Vaan derives operiō from Proto-Italic *op-wer-i(e)- (“to cover up”), from Proto-Indo-European *h₂uer-i(e)- (“to cover”).[5]

Earliest recorded meaning

Cato is the first author:[5][6] in his book on farming he gives instructions to put a lid on a jar and seal it.[2][7]

Semantic evolution

The TLL finds it mostly in the writers on farming from Cato and Varro on, once in Cicero, and not in the poets.[3] It meant a lid or cover:[2][8] Cicero says the windpipe is covered as if by a lid,[2][8] Livy describes chests whose lids were fastened with lead, Columella channels closed with covers, and Ulpian the covers of wells.[2] A building contract preserved in an inscription uses it of a facing of fir boards.[2] Jerome quotes the proverb invēnit patella operculum, “the pot has found its lid”.[7][9]

In British Medieval Latin it was the lid of a tomb or coffin, as in Bede, and also the cover of a vessel or a well and the visor of a helmet.[10] English took operculum in 1713 for a lid or for a lid-like structure in plants and animals.[4]

Timeline

  • 234–149 BC – Cato uses it of the lid of a jar.[2][6]
  • 116–27 BC – Varro uses it of covers.[2][8][6]
  • 81–43 BC – Cicero compares the cover of the windpipe to a lid.[2][6]
  • 59 BC–17 AD – Livy uses it of the lids of chests.[2][6]
  • before 223 AD – Ulpian uses it of the covers of wells.[2][6]
  • c. 383–419/420 AD – Jerome quotes the proverb of the pot and its lid.[7][6]
  • 1713 – English borrows it as operculum.[4]

Meanings

Noun

  1. A lid, cap or cover.[2][8][9]
  2. An overlay or facing for a wall or panel.[2]
  3. (Medieval Latin) The lid of a tomb or coffin.[10]

Word family

  • operculō
  • operiō
  • operīmentum
  • English operculum

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  6. ^ a b c d e f g Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  7. ^ a b c Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  8. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  9. ^ a b Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  10. ^ a b Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
Cite this entry

“Operculum.” Etymologically, 21 Oct. 2026, etymologically.com/la/operculum. Accessed 22 Oct. 2026.

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