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See also: Lux, LUX, and Lux.



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Etymology 1Edit

From Latin lūx (light).; from Proto-Indo-European *lewk- (white; light; bright). Cognates include Ancient Greek λευκός (leukós, white, blank, light, bright, clear), Ancient Greek λύκη (lúkē, light, morning twilight), Sanskrit रोचते (rocate), Middle Persian 𐭩𐭥𐭬 (rōz, day) and Old English lēoht (noun) (English light).

The archaic form in Latin is leuks, and later louks.


lux (plural lux or luxes)

  1. In the International System of Units, the derived unit of illuminance or illumination; one lumen per square metre. Symbol: lx

Etymology 2Edit

Compare French luxer. See luxate.


lux (third-person singular simple present luxes, present participle luxing, simple past and past participle luxed)

  1. (obsolete, transitive) To put out of joint; to luxate.

See alsoEdit

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for lux in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)




lux m

  1. lux (unit of illuminance or illumination)

Further readingEdit

  • lux in Příruční slovník jazyka českého, 1935–1957
  • lux in Slovník spisovného jazyka českého, 1960–1971, 1989



From Proto-Italic *louks, from the Proto-Indo-European root *lewk- (white; light; bright). Cognates include Ancient Greek λευκός (leukós, white, blank, light, bright, clear), Ancient Greek λύκη (lúkē, light, morning twilight), Sanskrit रोचते (rocate) and Old English lēoht (English light (noun)).



lūx f (genitive lūcis); third declension

  1. light (of the sun, stars etc.)
  2. daylight, day, moonlight
  3. life
  4. (figuratively) public view
  5. glory, encouragement
  6. enlightenment, explanation
  7. splendour
  8. eyesight, the eyes, luminary


Third declension.

Case Singular Plural
nominative lūx lūcēs
genitive lūcis lūcum
dative lūcī lūcibus
accusative lūcem lūcēs
ablative lūce lūcibus
vocative lūx lūcēs

Derived termsEdit

Related termsEdit


See alsoEdit


  • lux in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • lux in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • lux in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • lux in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • before daybreak: ante lucem
    • the day is already far advanced: multus dies or multa lux est
    • to see the light, come into the world: in lucem edi
    • those to whom we owe our being: ei, propter quos hanc lucem aspeximus
    • to sleep on into the morning: in lucem dormire
    • to shun publicity: publico carere, forum ac lucem fugere
    • (ambiguous) at daybreak: prima luce
    • (ambiguous) in full daylight: luce (luci)
    • (ambiguous) to enjoy the privilege of living; to be alive: vita or hac luce frui
    • (ambiguous) to shun publicity: forensi luce carere
    • (ambiguous) this is as clear as daylight: hoc est luce (sole ipso) clarius



lux m (plural lux or luxes)

  1. lux (the derived unit of illuminance)



lux m (plural lux)

  1. lux



lux c

  1. lux (singular and plural)