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 ?
Neil Glachman, CEO and Founder of Green Lumens stated: "Green Lumens is honored and excited to participate in the educational series 'Innovations' hosted by renowned environmentalist and Emmy award winning actor Ed Begley Jr.
They deliver efficacy levels of up to 170 lumens per watt at 65 milliamps, 5,000K and 80 CRI.
For an 1 LED sold today with a lifetime claim of 100,000 hours, an infallible test of lifetime and lumen maintenance would have had to have started sometime in 2001.
Even though they're still being improved, LEDs are already in the efficiency range of fluorescent tubes, and researchers predict that they'll ultimately deliver about 150 lumens per watt in commercial applications throughout a projected lifetime of at least 70,000 hours.
Then the wall between the two lumens stops, and the two lumens flow together.
For details on the Lumen Awards submission process please visit http:// www.
At 15 lumens per watt, the standard 60-watt incandescent bulb is the Hummer of light.
How do you make a one-piece silicone medical tube that has one lumen on one end and two lumens on the other?
Our position as a manufacturer of all colors allows us to support our customers with a portfolio that's efficient, delivers high light output, is extremely reliable, and is cost effective in lumens per Watt and lumens per dollar for a wide variety of solutions.
ALT s compact-size, 4-inch downlight that is built with the MHD-G LED generates over 1,800 lumens at 3000 K while other downlights can only produce 800 to 1000 lumens.
Delivering over 50 lumens per square millimeter, Philips Lumileds' new offering enables faster design of luminaires with on-board connector, NTC, and 1000-8000 lumen output