Etymologically

Etymology and origin of the Latin word mediatio

Confidence
Established
Formation
Derivation
First attested
354–430 Augustine, City of God More words from the 4th century
Ultimate origin
Latin mediō
Etymology tree
inherited borrowed derived
Latin medius
Italian mezzo
Spanish medio
Latin mediō
Latin mediātiō
English mediation
Spanish mediación
From the same root
English intermediary ← medius
Latin dīmidius ← medius
Latin intermedius ← medius
Latin mediālis ← medius
Latin mediānus ← medius
Latin medietās ← medius
Latin mediocris ← medius
Latin mediterrāneus ← medius
Latin meditullium ← medius
Latin medium ← medius
Latin merīdiēs ← medius
Spanish mitad ← medius
Spanish mediodía ← medio
Latin mediātor ← mediō

Forms

mediātiō f (genitive mediātiōnis); third declension[1][2]

Etymology

It is formed from Latin mediō (“to be in the middle; to halve”) + -tiō,[3][1][4] and is a Late Latin word.[5] The verb comes from medius (“middle”).[6]

Earliest recorded meaning

The first author to use it is Augustine,[3][1][7] who asks in the City of God what use the friendly mediation of demons would be to men if it brought them no benefit.[3]

Semantic evolution

In Christian Latin it was used of intercession and intervention between parties, Augustine applying it to Aaron's standing between Moses and Pharaoh,[3] and medieval theologians to the mediation of Christ between God and men.[4]

Medieval Latin kept the general sense of intervention,[8][5] and in law it meant mediation between parties to bring about a settlement.[9][10] It also meant a halving, one of the arithmetical operations,[11] and a negotiation.[11] In astronomy Roger Bacon used it of the sun or a planet coming between the points of a sign.[5] In music theory from the 13th century it named the middle cadence of a psalm verse.[12]

Timeline

  • 354–430 AD – Augustine uses it of intervention and intercession.[3][1][13]
  • 825 – The Council of Paris uses it of the mediation that the Greeks claimed for images.[4]
  • 1243 – Robert Grosseteste writes that an archbishop exercises his office through the mediation of his suffragan bishops.[5]
  • 13th century – Music theorists use it for the middle cadence in psalmody.[12]
  • late 14th century – Borrowed into English as mediation.[6]

Meanings

Noun

  1. (Late Latin) mediation, intercession, intervention.[3][1][14]
  2. (Ecclesiastical Latin) The mediation of Christ between God and humankind.[4]
  3. (Medieval Latin, law) Mediation between parties to bring about agreement.[9][10]
  4. (Medieval Latin) A negotiation.[11]
  5. (Medieval Latin, arithmetic) A halving.[11]
  6. (Medieval Latin, music) The middle cadence of a psalm verse.[12]

Usage notes

Manuscripts often write mediatio where meditatio “meditation” is meant.[3]

References

  1. ^ a b c d e Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  2. ^ Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  3. ^ a b c d e f g Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c d Novum Glossarium Mediae Latinitatis ab anno DCCC usque ad annum MCC (1957–), Copenhagen / Geneva / Paris: Union Académique Internationale; IRHT
  5. ^ 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
  6. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  8. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  9. ^ a b Bartal, Antal, et al. (1987–), Lexicon Latinitatis Medii Aevi Hungariae, Budapest: Akadémiai Kiadó; online ed. ELTE
  10. ^ a b Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl
  11. ^ a b c d Latinitatis medii aevi lexicon Bohemorum / Slovník středověké latiny v českých zemích (1977–), Prague: Academia; electronic version, Institute of Philosophy of the Czech Academy of Sciences
  12. ^ a b c Lexicon musicum Latinum medii aevi (1992–), Munich: Bayerische Akademie der Wissenschaften; online ed. Wörterbuchnetz
  13. ^ Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  14. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson

Borrowed into

Cite this entry

“Mediatio.” Etymologically, 7 Nov. 2026, etymologically.com/la/mediatio. Accessed 8 Nov. 2026.

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