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From the same root as pars, parcus, and parcō. It is from the Proto-Indo-European root *per- (sell), which also gave the Ancient Greek πόρνη (pórnē, prostitute), and πέρνημι (pérnēmi, sell).


portiō f (genitive portiōnis); third declension

  1. share, part, portion
  2. relation, proportion


Third declension.

Case Singular Plural
nominative portiō portiōnēs
genitive portiōnis portiōnum
dative portiōnī portiōnibus
accusative portiōnem portiōnēs
ablative portiōne portiōnibus
vocative portiō portiōnēs

Related terms[edit]



  • portio in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • portio in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • du Cange, Charles (1883), “portio”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
  • portio” in Félix Gaffiot’s Dictionnaire Illustré Latin-Français, Hachette (1934)
  • portion in The Century Dictionary, The Century Co., New York, 1911