Etymologically

Etymology and origin of the Latin word plethora

Confidence
Established
Formation
Borrowing
First attested
360 AD, Pelagonius
Borrowed from
Ancient Greek πληθώρα
Ultimate origin
Ancient Greek πληθώρα
Etymology tree
inherited borrowed derived
Latin plethora
English plethora

Pronunciation

  • Ecclesiastical: [pleˈtɔː.ra][1]

Forms

plēthōra f (genitive plēthōrae); first declension[1] Later manuscripts often have pletura, perhaps by association with plēre “to fill”;[2] plectora appears in a manuscript of Chiron.[2] Medieval spellings include plectora, plectoria and plectorea.[3]

Etymology

It is borrowed from Ancient Greek πληθώρα (plēthṓra, “fullness, satiety”),[1][2][3] from πλήθω (plḗthō, “to be full”).[1][4] Köbler traces it further to Proto-Indo-European *pelh₁- (“to fill”).[4]

Earliest recorded meaning

It is first found in the veterinary writer Pelagonius, as a medical term for a morbid excess of the body's fluids: ne nimia plethora adferat necem, “lest too great a fullness bring death”.[2][4]

Semantic evolution

Chiron speaks of a draught animal fevered by it, and the Mulomedicina of Vegetius uses it too; a medical work ascribed to Soranus explains it as an abundance or repletion of the humours, and the Latin Oribasius uses it of an excess of undigested humours.[2] Glosses render it with plenitudo, “fullness”.[2]

Medieval physicians kept it for a repletion of blood or another humour, often spelled plectora or plectoria.[3] English took it over as a medical word in the 1540s, and the figurative sense “overfullness” is recorded by 1700.[5]

Timeline

  • 360 AD – Pelagonius uses it for a dangerous excess of humours.[2][4]
  • 4th century AD – Chiron speaks of a fever caused by it.[2][4]
  • c. 400 AD – Vegetius uses it in his work on veterinary medicine.[2][4]
  • 1540s – English borrows it as a medical word.[5]
  • by 1700 – English uses it figuratively for overfullness.[5]

Meanings

Noun

  1. (medicine) An excess of blood or other humours in the body, plethora.[2][3]
  2. Fullness.[2]

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 Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  3. ^ a b c d 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
  4. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Borrowed into

Related etymologies

Cite this entry

“Plethora.” Etymologically, 24 Oct. 2026, etymologically.com/la/plethora. Accessed 24 Oct. 2026.

Last edited on . ·