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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
References in classic literature ?
- And afterwards, Non cui profundum Cæcitas lumen dedit Dircæus augur vidit hunc alto sinu, &c.
"'Lumen caeli, sancta Rosa!' Shouting on the foe he fell, And like thunder rang his war-cry O'er the cowering infidel.
They fancy some foul, obscure den, some horrible Tartarus "informis, ingens, cui lumen ademptum." But no, innocent friend; in these days men have learned the art of sinning expertly and genteelly, so as not to shock the eyes and senses of respectable society.
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.
The lumen is a measurement of light that illuminates a certain area.
About a decade ago, when lithium batteries and LEDs were the new wave in illumination tools, you could squeeze 80 lumens of light out of two 123A lithium batteries, and it would run for around an hour with erratic performance as the batteries lost power.
If malposition was identified, the tube was withdrawn until the endobronchial lumen was above the carina.
Output is 104 lumens at 3000K and 80CRI when driven at 350mA or 190 lumens when driven at 700mA.
A signature program of the IESNYC, the Lumen Awards and Gala, showcase and celebrate excellence in lighting design.
This was revealed by de Lumen during his homecoming victory held in Greenhills, San Juan recently.
Lumen Gentium ha sido ocasion de numerosas publicaciones de diverso estilo y genero.
Bitcoin wallet provider Blockchain&nbsp;said it&nbsp;will give away $125 million worth of cryptocurrency in the largest ever cryptocurrency "airdrop." &nbsp;CEO Peter Smith said Tuesday on the company website Blockchain will give away Stellar Lumens tokens to its 30 million customers as part of adding Steller Lumens token to its listings.