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See also: Nox and NOx



nox ‎(plural nox)

  1. (rare) millilux (unit of illuminance)




From Proto-Indo-European *nókʷts. Cognates include Ancient Greek νύξ ‎(núx), Sanskrit नक्ति ‎(nákti), Old English niht (English night) and Proto-Slavic *noťь.


nox f ‎(genitive noctis); third declension

  1. night (period of time)
    Nox pars obscura diei est.
    Night is the dim part of the day.
  2. darkness
  3. a dream
  4. (figuratively) confusion
  5. (figuratively) ignorance
  6. (figuratively) death


Third declension i-stem.

Case Singular Plural
nominative nox noctēs
genitive noctis noctium
dative noctī noctibus
accusative noctem noctēs
ablative nocte noctibus
vocative nox noctēs



Derived terms[edit]



  • nox in Charlton T. Lewis & Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • nox in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • NOX in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • nox” in Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
  • Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • a star-light night: nox sideribus illustris
    • till late at night: ad multam noctem
    • in the silence of the night: silentio noctis
    • night and day: noctes diesque, noctes et dies, et dies et noctes, dies noctesque, diem noctemque
    • to prolong a conversation far into the night: sermonem producere in multam noctem (Rep. 6. 10. 10)
    • night breaks up the sitting: nox senatum dirimit
    • (ambiguous) while it is still night, day: de nocte, de die
    • (ambiguous) late at night: multa de nocte
    • (ambiguous) in the dead of night; at midnight: intempesta, concubia nocte
  • nox in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • nox in William Smith, editor (1848) A Dictionary of Greek Biography and Mythology, London: John Murray