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Definition of Lumen

Noun: lumen (lumens,lumina)  loo-mun

  1. 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
     
  2. A cavity or passage in a tubular organ
    "the lumen of the intestine"

See also:
lumbus
lumenal

Anagrams containing the word lumen

lnmeu nlume enlum menlu umenl