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 periodicals archive ?
05) and the residual lumen area was larger (P < 0.
USA): Intimal area (IA), intimal/medial area (I/M) ratio, and residual lumen area (LA).
Echogenic bubbles can be seen in the residual lumen and can sometimes even be seen in the surrounding tissue, but these are of no clinical importance.