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Meaning & Definition of Lumen in English

English

Lumen

/lumən/

noun

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

    synonym:
  • lumen
  • ,
  • lm

2. A cavity or passage in a tubular organ

  • "The lumen of the intestine"
    synonym:
  • lumen