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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

lumen

The inside of any tube, such as a blood vessel, an air passage (bronchus) or the intestine.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

lumen

any cavity enclosed within a cell, or structure, such as the lumen of the gut.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Lumen

The inner cavity or canal of a tube-shaped organ, such as the bowel.
Mentioned in: Amebiasis
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

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
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

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]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
"We really value those partnerships with the universities and the community colleges," Lumens said.
The white light models were succeeded by the M600 Ultra that produced 500, 600 and currently 1,000 lumens. Others, such as the M600IB features Surefire's IntelliBeam technology that automatically adjusts output ranging from 100 to 600 lumens courtesy of an intelligent sensor and microprocessor.
Giving away lumens for free is an invitation to communities to design the services they need," said McCaleb.
The Duty Series CS RXP 1x18650 produces 1,045 lumens on high and features low, low-medium, medium-high, high, and strobe functions.
Osram said the acquisition of Digital Lumens puts the company in a strong position when it comes to offering future-focussed digital solutions for the facilities management sector and IoT applications.
If the LED source efficacy is 100 lumens per watt, but the LED fixture efficacy is 17 lumens per watt, then the optical efficiency of the fixture is only 17 percent.
Lumen output: The quantity of light that leaves the lamp.
Trying to spot any detail more than a few feet away with anything less than 50 lumens is a non-starter.
"With the request for tighter tolerances and the lot-to-lot variability of silicone material it can be difficult to maintain multiple lumens. Profiles may need to be modified slightly to ensure a robust and efficient production process.
Flushing a catheter lumen used for intermittent infusions is important.
This integrated approach is enabled by our well-validated and robust metal vertical LED product portfolio, which can be reliably driven harder to deliver higher than average lumen density and increase the lumens per dollar," Dr.
The Model TWLLGCP LED adjustable-beam flashlight produces 160 lumens with a 532nm green laser beam, and mounts to any 1-inch or 30mm tube.