Lexic.us

Definition of Lumen

1. Noun. A unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions.

2. Noun. A cavity or passage in a tubular organ. "The lumen of the intestine"

Definition of Lumen

1. n. A unit of illumination, being the amount of illumination of a unit area of spherical surface, due to a light of unit intensity placed at the center of the sphere.

Definition of Lumen

1. Noun. (physics) In the International System of Units, the derived unit of luminous flux; the amount of light that falls on a unit area at unit distance from a source of one candela. Symbol: lm. ¹

2. Noun. (anatomy) The cavity or channel within a tube or tubular organ. ¹

3. Noun. (botany) The cavity bounded by a plant cell wall. ¹

4. Noun. (medicine) The bore of a tube such as a hollow needle or catheter. ¹

¹ Source: wiktionary.com

Definition of Lumen

1. the inner passage of a tubular organ [n -MENS or -MINA] : LUMENAL, LUMINAL [adj]

Medical Definition of Lumen

1. The cavity or channel within a tube or tubular organ. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Lumen

lumbricalis lumbricals lumbrici lumbricidal lumbricide lumbriciform lumbricine lumbricines lumbricoid lumbricosis

lumbrics lumbricus lumbrokinase lumbus lumefantrine lumen (current term) lumenal lumened lumens lumic

lumican lumichrome lumicolchicine lumicolchicines lumicrine lumiflavin lumiliximab lumina lumina gold luminaire

Literary usage of Lumen

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Course in Electrical Engineering by Chester Laurens Dawes (1922)
"Luminous Flux: lumen.—Light may be considered as a flux which emanates from a luminous ... The amount of illumina- tion emitted by a luminous 1 lumen FIG. ..."

2. Monographic Medicine by William Robie Patten Emerson, Guido Guerrini, William Brown, Wendell Christopher Phillips, John Whitridge Williams, John Appleton Swett, Hans Günther, Mario Mariotti, Hugh Grant Rowell (1916)
"F. Diseases of the Nervous System Due to Disturbances of the lumen The lumen of the central nervous system consists of the central canal of the spinal cord, ..."

3. Quarterly Journal of Microscopical Science edited by Biologists Limited, The Company of. (1879)
"narrow body and small lumen of the peptic glands of the fundus of dog's stomach form a very marked contrast with the broad tubes and large lumen of the ..."

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