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lumen - Dictionary definition and meaning for lumen
LUMEN
(noun) a cavity or passage in a tubular organ
"the lumen of the intestine"
(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
synonyms : lm
WordNet® 3.0, © 2006 by Princeton University.
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