lumen
See also: lúmen
English
Etymology
Borrowed from Latin lumen (“light, an opening”). Use as a unit was first adopted by French physicist André Blondel in 1894.
Pronunciation
- (Received Pronunciation) IPA(key): /ˈluːmən/
- (General American) enPR: lo͞oʹmən, IPA(key): /ˈlumən/
Audio (UK) (file) - Rhymes: -uːmən
- Hyphenation: lu‧men
Noun
lumen (plural lumens or lumina)
- (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.
- (anatomy) The cavity or channel within a tube or tubular organ.
- (botany) The cavity bounded by a plant cell wall.
- (medicine) The bore of a tube such as a hollow needle or catheter.
Derived terms
Translations
SI-unit for luminous flux
anatomy: cavity within tubular organ
botany: cavity bounded by cell wall
Czech
Finnish
Alternative forms
Pronunciation
- IPA(key): /ˈluːmen/, [ˈluːme̞n]
- Rhymes: -uːmen
- Hyphenation: lu‧men
Declension
Inflection of lumen (Kotus type 6/paperi, no gradation) | |||
---|---|---|---|
nominative | lumen | lumenit | |
genitive | lumenin | lumenien lumeneiden lumeneitten | |
partitive | lumenia | lumeneita lumeneja | |
illative | lumeniin | lumeneihin | |
singular | plural | ||
nominative | lumen | lumenit | |
accusative | nom. | lumen | lumenit |
gen. | lumenin | ||
genitive | lumenin | lumenien lumeneiden lumeneitten | |
partitive | lumenia | lumeneita lumeneja | |
inessive | lumenissa | lumeneissa | |
elative | lumenista | lumeneista | |
illative | lumeniin | lumeneihin | |
adessive | lumenilla | lumeneilla | |
ablative | lumenilta | lumeneilta | |
allative | lumenille | lumeneille | |
essive | lumenina | lumeneina | |
translative | lumeniksi | lumeneiksi | |
instructive | — | lumenein | |
abessive | lumenitta | lumeneitta | |
comitative | — | lumeneineen |
Pronunciation
- IPA(key): /ˈlumen/, [ˈlume̞n]
- Hyphenation: lu‧men
French
Pronunciation
- IPA(key): /ly.mɛn/
Audio (Paris) (file)
Latin
Etymology
From Proto-Indo-European *léwksmn̥, derived from the root *lewk- (“bright”).[1]
Equivalent to lūx + -men.
Pronunciation
- (Classical) IPA(key): /ˈluː.men/, [ˈɫuː.mɛn]
- (Ecclesiastical) IPA(key): /ˈlu.men/, [ˈluː.men]
Noun
lūmen n (genitive lūminis); third declension
Inflection
Third declension neuter.
Case | Singular | Plural |
---|---|---|
Nominative | lūmen | lūmina |
Genitive | lūminis | lūminum |
Dative | lūminī | lūminibus |
Accusative | lūmen | lūmina |
Ablative | lūmine | lūminibus |
Vocative | lūmen | lūmina |
Descendants
References
- 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, 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
- to lose one's sight: oculos, lumina amittere
- Jacqueline Picoche, Jean-Claude Rolland, Dictionnaire étymologique du français, Paris 2009, Dictionnaires Le Robert, →ISBN
Polish
Romanian
Spanish
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