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 periodicals archive ?
A thylakoid lumenal 29 kDa chloroplastic gene in qBFR4 is enzyme coded as peroxidase and is involved in peroxidase activity.
Increased faecal serine protease activity in diarrhoeic IBS patients: a colonic lumenal factor impairing colonic permeability and sensitivity.
In areas of inflammation, there is evidence of acute tubular injury with proximal tubules demonstrating lumenal distension with epithelial flattening.
ETT lumenal occlusion with biofilm and secretion, which is unpredictable of MV time [17], may result in VAP or other infections in the lungs.
The lumenal plasma membrane of the absorptive cell contains at least three amino acid transporters (AAT), one each for acidic, basic and neutral amino acids (Xiong et al., 2012).
Neutrophil-epithelial crosstalk at the intestinal lumenal surface mediated by reciprocal secretion of adenosine and IL-6.
Park et al., "The rice thylakoid lumenal cyclophilin OsCYP20-2 confers enhanced environmental stress tolerance in tobacco and Arabidopsis," Plant Cell Reports, vol.
Thus, several of these papules were removed and evaluated pathologically, revealing a mixture of milia and small cysts consistent with the diagnosis of eruptive vellus hair cysts; these contained multiple small lumenal degenerating hair shafts.
Each of these three proteins contains a lumenal unfolded protein stress-sensing domain, and under normal proteostasis, the stress-sensing domains bind to the chaperone BiP.
Previous studies have confirmed Long-term patients commonly become infected with mixed communities of mainly Gram-negative nosocomial species, Under these conditions, bacteria colonize the catheters, particularly the lumenal surfaces, and form extensive biofilms [6, 28].
Close review shows angioinvasion of fungal forms resulting in lumenal thrombosis.
These cells consist of several ontogenically and phenotypically distinct populations of T cells (Guy-Grand, 1998) and they are one of the immune cells in intestinal epithelium that are involved in the development of tolerance and adaptive response to lumenal antigens while IELs perform surveillance of the epithelium (Lundqvist et al., 1995).