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 ?
Therefore, it is easy for the readers to see that a tight, identical curve placed in different zones can yield wildly different lumen values.
Visit the Lumen Awards website Lumen Awards Website for more information.
LLD is based on the lumen depreciation curve for the LED product being considered at a defined drive current and operating temperature.
Lumens can start and stop, previously accomplished only by welding plugs in a secondary operation.
Lumen provides organizations and developers with the tools to create localized (multi-lingual) applications that operate in a cross-platform environment (Linux, Windows, Unix, MacOS).
The Cree XM-L2 LED is designed for very high lumen applications such as indoor high bay and outdoor lighting.
Seven New York City-based lighting design finns--Arup, Cline Bettridge Bernstein Lighting Design, Cooley Monato Studio, Fisher Marantz Stone, Lighting Workshop, Reveal Design Group, and Tillotson Design Associates--received Lumen Awards for excellence, professionalism, ingenuity, and originality in lighting design.
U5-632 is a 2,200-lumen projector offering 3,000 lumens in bright mode.
How do you make a one-piece silicone medical tube that has one lumen on one end and two lumens on the other?
A First, look at the lumen rating, not the bulb wattage, to compare "real" light output.
Many materials have been used to expand and support the lumen in patients with advanced stenosis and to correct defects created by extended partial laryngectomy.
New non-contact lumen locating technology from Technical Innovations automates the process of isolating a desired lumen for hole drilling or punching in a multi-lumen catheter with Technical Innovations' Smart Driller CL automated hole-drilling and hole-punching machine.