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PIE root

Medieval Latin, derived from Latin auctus, from augeō ‎(to increase, nourish). Surface analysis: auct(us) ‎(enlarged”, “enriched) +‎ -or ‎(abstract nominal derivational suffix)



auctor m ‎(genitive auctōris); third declension

  1. (Medieval Latin) one who gives increase (hence: an originator, causer, doer, founder)
    1. seller, vendor
    2. author
    3. (figuratively) authorship, agency, encouragement


Third declension.

Case Singular Plural
nominative auctor auctōrēs
genitive auctōris auctōrum
dative auctōrī auctōribus
accusative auctōrem auctōrēs
ablative auctōre auctōribus
vocative auctor auctōrēs

Derived terms[edit]



  • auctor” in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879.
  • auctor” in Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to have as authority for a thing: auctore aliquo uti ad aliquid
    • an historian: rerum auctor (as authority)
    • the writer, author: scriptor (not auctor = guarantor)
    • (ambiguous) to give a person advice: auctorem esse alicui, ut
    • (ambiguous) to have as authority for a thing: auctorem aliquem habere alicuius rei
    • (ambiguous) the book is attributed to an unknown writer: liber refertur ad nescio quem auctorem
    • (ambiguous) statesmen: auctores consilii publici
  • auctor” in Ramminger, Johann (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700[2], pre-publication website, 2005-2016



auctor m (plural auctores, feminine auctora, feminine plural auctoras)

  1. Obsolete spelling of autor