lumen

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lu·men

 (lo͞o′mən)
n. pl. lu·mens or lu·mi·na (-mə-nə)
1. Anatomy The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.
2. Biology The interior of a membrane-bound compartment or organelle in a cell.
3. Abbr. lm Physics The SI unit of luminous flux, equal to the amount of light per unit time passing through a solid angle of one steradian from a light source of one candela intensity radiating equally in all directions. See Table at measurement.

[Latin lūmen, an opening, light; see leuk- in Indo-European roots.]

lu′men·al, lu′min·al adj.

lumen

(ˈluːmɪn)
n, pl -mens or -mina (-mɪnə)
1. (Units) the derived SI unit of luminous flux; the flux emitted in a solid angle of 1 steradian by a point source having a uniform intensity of 1 candela. Symbol: lm
2. (Anatomy) anatomy a passage, duct, or cavity in a tubular organ
3. (Botany) a cavity within a plant cell enclosed by the cell walls
[C19: New Latin, from Latin: light, aperture]
ˈlumenal, ˈluminal adj

lu•men

(ˈlu mən)

n., pl. -mens, -mi•na (-mə nə)
1. the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbr.: lm
2. the canal, duct, or cavity of a tubular organ.
[1870–75; < New Latin; Latin lūmen, s. lūmin- light, window]

lu·men

(lo͞o′mən)
1. Anatomy The central space in a tubular organ, such as a blood vessel or intestine.
2. Physics A unit used to measure the amount of light passing through a given area per second. One lumen is equal to the amount of light that passes through a given area (shaped like a cone) that is illuminated by a light with a brightness of one candela.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lumen - a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions
luminous flux unit - a measure of luminous flux per unit area
2.lumen - a cavity or passage in a tubular organ; "the lumen of the intestine"
bodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the body
Translations
References in classic literature ?
And afterwards, Non cui profundum Cæcitas lumen dedit Dircæus augur vidit hunc alto sinu, &c.
They fancy some foul, obscure den, some horrible Tartarus "informis, ingens, cui lumen ademptum.
Above him was the throat of the balloon bunched and tied together, but with an open lumen through which,Bert could peer up into a vast, empty, quiet interior, and out of which descended two fine cords of unknown import, one white, one crimson, to pockets below the ring.
Somehow the lumens get bigger and the lights get smaller.
The author mentions in his article that "if you take that same grazer curve and simply shift the peak from 5 to 45 degrees, your lumen values jump from 300 to over 1,700 lumens.
By resuming ownership of the Lumen Awards as an autonomous IESNYC program, we hope to eliminate any confusion people may experience when participating in either awards program as well as simplify the administration and management of the Lumens," said Megan Carroll, chair of the Lumen Committee and director of sales, east, for Xicato.
While single lumen tubing is needed for a range of applications, designers are looking at multiple lumens in order to cut down on the number of tubes required within an often already constrained space.
The C7100 produces 1,000 lumens per foot and operates from a single power feed with run lengths up to 120 feet at 110 volts or 250 feet at 277 volts.
When it comes to flashlights and weapon lights, the term lumens, as a measure of illumination, is thrown around pretty regularly, but chances are most people don't know what a lumen actually is.
Leveraging silicon carbide technology, the XB-D LED delivers up to 139 lumens and 136 lumens per Watt in cool white (6000K) or up to 107 lumens and 105 lumens per Watt in warm white (3000K), both at 350 mA and 85[degrees]C.
Digital Lumens recently announced that Ardo UK, a leading supplier of high-quality frozen fruit, vegetables and carbohydrates (potato, rice and pasta), has upgraded an 80,000-cubic-metre mobile racking cold storage facility in Kent, England to the Digital Lumens Intelligent Lighting System, saving 97% of its lighting-related energy costs annually.