Etymologically

Etymology and origin of the Latin word culex

Confidence
Probable
Formation
Inherited
First attested
c. 250–184 BC, Plautus
Inherited from
Proto-Italic *kul-i-k-
Ultimate origin
Proto-Indo-European *ḱuH-ló-

Pronunciation

  • Classical: [ˈkʊ.ɫɛks][1]
  • Ecclesiastical: [ˈkuː.leks][1]

Forms

culex m (genitive culicis); third declension[1] Martial has the spelling culix.[2] Plautus once uses it as a feminine.[2][3]

Etymology

It is probably inherited from Proto-Italic *kul-i-k-, from Proto-Indo-European *ḱuH-ló- (“sharp”).[4][1] An Italo-Celtic form with a long /ū/ before a stressed syllable would have given Latin ⟨cul-⟩ by Dybo's shortening of long vowels before a resonant, but where the accent lay is uncertain.[4] Isidore of Seville derived it from aculeus (“sting”), since the gnat sucks blood with its sting.[5]

Cognate with Old Irish cuil (“fly”), Welsh cylionen (“midges”) and Sanskrit शूल (śū́la-, “spear”);[4] Wiktionary adds Old Armenian սլաք (slakʻ, “roasting spit”).[1]

Earliest recorded meaning

It is found from Plautus on, for the gnat: in the Curculio he lists muscae, culicēs, cimicēs, “flies, gnats, bugs”.[4][2][6]

Semantic evolution

In Classical Latin it was a gnat or midge, with many kinds;[3] Pliny the Elder also uses it of the insect that fertilises the fig.[7] Plautus uses it, in the feminine, as an insult for a tiresome old lover: cāna culex, “grey gnat”.[2][7] Culex was the title of a short poem attributed to Virgil.[2][7] Pliny uses the plural for the specks that seem to float before the eyes,[2] and Palladius for a plant, the fleawort.[7][8]

In Medieval Latin it kept the sense “gnat”, often with reference to Matthew 23:24.[9]

Timeline

  • c. 250–184 BC – Plautus uses it for the gnat, and as an insult.[2][6]
  • 96–55 BC – Lucretius uses it for the gnat.[3][6]
  • 23/24–79 AD – Pliny the Elder uses it for spots before the eyes.[2][6]
  • c. 560–636 AD – Isidore derives it from aculeus.[5][6]

Meanings

Noun

  1. A gnat, midge or similar insect.[2][3]
  2. (term of abuse) A tiresome old lover.[2][3]
  3. (plural) Specks that seem to move before the eyes.[2]
  4. A plant, fleawort.[7][8]

References

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

Related etymologies

Cite this entry

“Culex.” Etymologically, 20 Oct. 2026, etymologically.com/la/culex. Accessed 22 Oct. 2026.

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