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lumen
(redirected from lumenal)

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.09 sec.
lu·men  (lmn)
n. pl. lu·mens or lu·mi·na (-m-n)
1. Anatomy The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.
2. Abbr. lm Physics The unit of luminous flux in the International System, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions. See Table at measurement.
3. Botany The cavity bounded by a plant cell wall.

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

lumen·al, lumin·al adj.

lumen  (lmn)
Plural lumens or lumina
1. The central space within a tube-shaped body part or organ, such as a blood vessel or the intestine.
2. The SI derived unit used to measure the amount of light passing through a given area per second. One lumen is equal to the luminous flux passing per unit solid angle from a light source with a strength of one candela.
ThesaurusLegend:  Synonyms Related Words Antonyms
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


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? Mentioned in ? References in periodicals archive
 
Many of the airways from Mexico City also showed lumenal distortion (Figure 1C).
Light microscopy showed a well developed neointima lining the anastomotic region of the graft without apparent lumenal reduction.
Instead, evidence suggests that denervation leads to an "up-regulation" of muscarinic receptors that promotes increased calcium influx in the coronary arteries of the transplanted heart, facilitating a more insidious, diffuse, circumferential narrowing of arterial lumenal diameters.
 
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