Other Definitions
lumen (enc)
Lumen
Noun
1.
lumen
- 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
lm
luminous flux unit
- a measure of luminous flux per unit area
2.
lumen
- a cavity or passage in a tubular organ; "the lumen of the intestine"
bodily cavity
,
cavum
,
cavity
- (anatomy) a natural hollow or sinus within the body
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luminous flux
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