lumen


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lumen

 [lu´men] (L.)
1. the cavity or channel within a tube or tubular organ, as a blood vessel or the intestine.
2. the SI unit of rate of flow of radiant energy, specifically that of the visible spectrum. adj., adj lu´minal.

lu·men

, pl.

lu·mi·na

,

lu·mens

(lū'men, -min-ă, -menz),
1. The space in the interior of a hollow tubular structure (for example, artery or intestine).
2. The unit of luminous flux; the luminous flux emitted in a unit solid angle of 1 steradian by a uniform point source of light having a luminous intensity of 1 candela.
3. The volume enclosed within the membranes of a mitochondrion or of the endoplasmic reticulum.
4. The bore of a catheter or hollow needle.
[L. light, window]

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.

lumen

(lo͞o′mən)
n. pl. lu·mens or lu·mina (-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. lmPhysics 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.

lu′men·al, lu′min·al adj.

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.

lu·men

(lm), pl. lumina (lū'mĕn, -mi-nă)
1. The space in the interior of a tubular structure, such as an artery or intestine.
2. The unit of luminous flux; the luminous flux emitted in a unit solid angle of 1 steradian by a uniform point source of light having a luminous intensity of 1 candela.
[L. light, window]

lumen

The inside of any tube, such as a blood vessel, an air passage (bronchus) or the intestine.

lumen

any cavity enclosed within a cell, or structure, such as the lumen of the gut.

Lumen

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

lumen

space within hollow tube, e.g. cross-sectional area of an artery

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

lu·men

, pl. lumina (lūmĕn, -mi-nă)
1. Space in interior of a hollow tubular structure (e.g., artery or intestine).
2. The bore of a catheter or hollow needle.
[L. light, window]

lumen (loo´mən),

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.
References in periodicals archive ?
Intense Lighting's new ICL-MBW2 is the industry's highest lumen output recessed pull-down luminaire.
LLD is based on the lumen depreciation curve for the LED product being considered at a defined drive current and operating temperature.
To provide additional exposure for applications created by ISV's and developers, Lumen Software hosts the Lumen SoftWarehouse.
Projects are awarded in the following categories: Lumen Award of Excellence, the highest level of recognition for a permanent architectural application; Lumen Citation, a special recognition for an art installation, technical detail, portion of a single project, temporary installation or other work; Lumen Award of Merit, in recognition of a permanent architectural application; the Feltman Award, for excellence in retail merchandise lighting.
The primary aim of laryngotracheal reconstruction is to establish an adequate airway by creating a wide lumen with an epithelial lining and a flexible structure that does not collapse during respiration.
All the thickening in atherosclerosis, however it comes about, results in some of the muscle cells residing far from the vessel lumen.
Its blue LEDs have the best hot/cold factor which delivers superior in-application results and delivers leading lumens per Watt.
Delivering more than 1800 lumens at 14 W and 2500 lumens at 19 W respectively, the XLamp MHD-E and MHD-G LEDs are ideal for semi-directional, high-lumen applications such as downlights, high-bay and outdoor area applications.
The open course frameworks were created through collaborative work between members of the Lumen Learning team and faculty members at nine institutions participating in the Kaleidoscope Open Course Initiative.
Francesca Bettridge accepted a Lumen Award of Merit for the Bank of America Tower at One Bryant Park.
The Illuminating Engineering Society New York Section (IESNY) announced the recipients of the 2006 Lumen Awards, for excellence, professionalism, ingenuity and originality in lighting design.
These compact DLP projectors have a contrast ratio of 2000:1 While the 732 is 2300 lumens, the 632 is a 2200 lumen projector with 3000 lumens in bright mode and features a short focus lens that allows large images to be displayed within short distances.