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lumen
(redirected from lumenal)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.06 sec.
lumen /lu·men/ (loo´men) pl. lu´mina   [L.]
1. the cavity or channel within a tube or tubular organ.
2. the SI unit of luminous flux; it is the light emitted in a unit solid angle by a uniform point source with luminous intensity of one candela.lu´minal

residual lumen  the remains of Rathke's pouch, between the distal and intermediate parts of the pituitary gland.

lu·men (lmn)
n. pl. lumens or lu·mi·na (-m-n)
1. The inner open space or cavity of a tubular organ, as of a blood vessel.
2. The unit of luminous flux in the International System of Units, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions.

lumen·al, lumin·al adj.

Lumen
The inner cavity or canal of a tube-shaped organ, such as the bowel.
Mentioned in: Amebiasis

lumen
[lo̅o̅′mən] pl. lumina, lumens
Etymology: L, light
1 a tubular space or the channel within any organ or structure of the body.
2 a unit of luminous flux that equals the flux emitted in a unit solid angle by a point source of one candle intensity. lumenal, luminal, adj.

lumen (loo´mn),
n the space within a tube structure, such as a blood vessel, tube, or duct.

lumen
pl. lumina [L.]
1. the cavity or channel within a tube or tubular organ, as a blood vessel or the intestine.
2. the SI unit of light flux.

lumen
1. SI unit of luminous flux. It is equal to the flux emitted within a unit solid angle of one steradian by a point source with a luminous intensity of one candela. Symbol: lm. 2. The space in the interior of a tubular organ, such as an artery. See luminous flux; quantity of light; lux; SI unit.
Table L4 Approximate luminance (in cd/m2) of some objects
sun109
car headlight107
incandescent lamp (tungsten)106-107
fluorescent lamp104-105
clear sky at noon104
cloudy sky at noon103
shady street by day103-104
full moon103
book print under artificial light>102
photopic vision>10
street illumination1-10−1
mesopic vision10-10−3
cloudless night sky with full moon10−2
scotopic vision<10−3
moonless and cloudless night sky10−3-10−6


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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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