Etymologically

pilosus

Etymology and origin of the Latin word pilosus

Confidence
Established
Formation
Derivation
First attested
Lucilius
Ultimate origin
Latin (pilus)
Etymology tree
inherited borrowed derived
Latin pilosus
English caterpillar

Pronunciation

  • IPA (Classical): [pɪˈɫoː.sʊs][1]
  • IPA (Ecclesiastical): [piˈlɔː.s̬us][1]

Forms

pilōsus (feminine pilōsa, neuter pilōsum); first/second-declension adjective[1]

Etymology

It is from Latin pilus (“a hair”) + -ōsus.[2][1]

Earliest recorded meaning

Köbler dates its first use to Lucilius, c. 180–102 BC.[3] Varro says the sheep has a hairy belly.[4][5]

Semantic evolution

It meant covered with hair, hairy, shaggy, of animals, people and leaves, as Pliny's hairier leaves.[2][4] Hairiness marked uncouthness: Cicero mocks Piso's hairy cheeks, and Juvenal hairy nostrils.[2][6]

In the Vulgate pilōsus as a noun was a hairy monster, a satyr or demon.[3][7] Medieval British writers also used it of Esau.[8] English pilose came in 1753, and Etymonline traces caterpillar to Old North French caterpilose, from Late Latin catta pilōsa “hairy cat”.[9]

Timeline

  • c. 180–102 BC – Lucilius uses it.[3]
  • 81–43 BC – Cicero mocks Piso's hairy cheeks.[2][3]
  • 390–406 AD – The Vulgate uses it as a noun for a hairy demon.[3]
  • mid-15th century – English caterpillar is recorded.[9]

Meanings

Adjective

  1. hairy, shaggy.[2][4]
  2. Uncouth, unkempt.[2]

Noun

  1. (Ecclesiastical Latin) A hairy monster, satyr, demon.[7][3]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  6. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  7. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  8. ^ 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
  9. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Descendants

Cite this entry

“Pilosus.” Etymologically, 15 Oct. 2026, etymologically.com/la/pilosus. Accessed 16 Oct. 2026.

Last edited on . ·