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.

Exact synonyms: Lm
Generic synonyms: Luminous Flux Unit



2. Noun. A cavity or passage in a tubular organ. "The lumen of the intestine"
Generic synonyms: Bodily Cavity, Cavity, Cavum

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)

Lumen Pictures

Click the following link to bring up a new window with an automated collection of images related to the term: Lumen Images

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 ..."

Other Resources Relating to: Lumen

Search for Lumen on Dictionary.com!Search for Lumen on Thesaurus.com!Search for Lumen on Google!Search for Lumen on Wikipedia!

Search