Latin

Noun

theōria f ‎(genitive theōriae); first declension

1. (philosophy) speculation, theory

Inflection

First declension.

Descendants

• English: theory
• French: théorie
• Italian: teoria
• Old Irish: teöir
  • Irish: teoir
• Spanish: teoría

References

• theoria in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• THEORIA in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• Félix Gaffiot (1934), “theoria”, in Dictionnaire Illustré Latin-Français, Paris: Hachette.
• theoria in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• theoria in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

Portuguese

Noun

theoria f (plural theorias)

1. Obsolete spelling of teoria (used in Portugal until September 1911 and died out in Brazil during the 1920s).