lumen

Borrowed from Latin lumen (“light, an opening”). Use as a unit was first adopted by French physicist André Blondel in 1894.

• (Received Pronunciation) IPA^(key): /ˈluːmən/
• (General American) enPR: lo͞oʹmən, IPA^(key): /ˈlumən/

• Audio (UK)

  (file)

• Rhymes: -uːmən
• Hyphenation: lu‧men

lumen (plural lumens or lumina)

1. (physics) In the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm.
2. (anatomy) The cavity or channel within a tube or tubular organ.
3. (botany) The cavity bounded by a plant cell wall.
4. (medicine) The bore of a tube such as a hollow needle or catheter.

• lumenal
• lumenless
• lumenogenesis
• lumen second

• candela
• luminal
• lux

• IPA^(key): [ˈlumɛn]
• Hyphenation: lu‧men

Borrowed from Latin lumen.

lumen m inan

1. lumen (unit of luminous flux)

lumen m anim

1. capable talented person

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

Borrowed from Latin lumen.

• IPA^(key): /ˈlu(ː)men/, [ˈlu(ː)me̞n]
• Rhymes: -umen
• Syllabification^(key): lu‧men

lumen

1. (physics, anatomy, botany, medicine) lumen

• luumen

• IPA^(key): /ˈlumen/, [ˈlume̞n]
• Rhymes: -umen
• Syllabification^(key): lu‧men

lumen

1. genitive singular of lumi

• lemun, melun

Borrowed from Latin lumen.

• IPA^(key): /ly.mɛn/

• Audio (Paris)

  (file)

lumen m (plural lumens)

1. (physics) lumen (SI unit of measurement)
2. (anatomy) lumen
3. (botany) lumen

• “lumen”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

From Proto-Italic *louksmən, from Proto-Indo-European *léwksmn̥, derived from the root *lewk- (“bright”).[1]

Equivalent to lūx +‎ -men.

• (Classical) IPA^(key): /ˈluː.men/, [ˈɫ̪uːmɛn]
• (Ecclesiastical) IPA^(key): /ˈlu.men/, [ˈluːmen]

lūmen n (genitive lūminis); third declension

1. light, source of light

   Synonym: lūx

2. (poetic) the eyes
3. (poetic) daylight
4. (poetic) brightness
5. (poetic) the light of life
6. An opening through which light can penetrate such as an air-hole or a window.
7. The opening or orifice in a water-pipe or funnel
8. (figuratively) a luminary, star, light (a most distinguished person)

Third-declension noun (neuter, imparisyllabic non-i-stem).

• “lumen”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “lumen”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• lumen in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• lumen in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
• Carl Meißner; Henry William Auden (1894) Latin Phrase-Book‎, London: Macmillan and Co.
  • to lose one's sight: oculos, lumina amittere
    
  • to deprive a person of his eyes: luminibus orbare aliquem
    
  • to obscure the mental vision: mentis quasi luminibus officere (vid. sect. XIII. 6) or animo caliginem offundere
    
  • shining lights in the literary world: clarissima litterarum lumina
    
  • flowers of rhetoric; embellishments of style: lumina, flores dicendi (De Or. 3. 25. 96)
    
  • to obstruct a person's view, shut out his light by building: luminibus alicuius obstruere, officere
    

Borrowed from Latin lumen.

• IPA^(key): /ˈlu.mɛn/

• Audio

  (file)

• Rhymes: -umɛn
• Syllabification: lu‧men

lumen m inan

1. lumen (SI-unit)
2. (archaic) display, explanation

• lumen in Wielki słownik języka polskiego, Instytut Języka Polskiego PAN
• lumen in Polish dictionaries at PWN

Borrowed from Latin lumen, French lumen. Doublet of the inherited lume.

lumen m (plural lumeni)

1. (physics) lumen (SI unit of measurement)

lumen n (plural lumene)

1. (anatomy) lumen

Borrowed from Latin lumen. Doublet of the inherited lumbre.

• IPA^(key): /ˈlumen/ [ˈlu.mẽn]
• Rhymes: -umen
• Syllabification: lu‧men

lumen m (plural lúmenes)

1. lumen

• “lumen”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014

Borrowed from Latin lumen.

lumen

1. lumen (singular and plural)

• mulen, mulne