Definitions for lumenˈlu mən; -mə nə
This page provides all possible meanings and translations of the word lumen
Random House Webster's College Dictionary
lu•menˈlu mən; -mə nə(n.)(pl.)-mens, -mi•na
the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity.
Ref: Abbr.: lm 2
the canal, duct, or cavity of a tubular organ.
Origin of lumen:
1870–75; < NL; L lūmen, s. lūmin- light, window
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
a cavity or passage in a tubular organ
"the lumen of the intestine"
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.
The cavity or channel within a tube or tubular organ.
The cavity bounded by a plant cell wall.
The bore of a tube such as a hollow needle or catheter.
A lumen in biology is the inside space of a tubular structure, such as an artery or intestine. By extension, the term lumen is also used to describe the inside space of a cellular component or structure, such as the endoplasmic reticulum.
Translations for lumen
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