Definition of lumen

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  • lumen is a valid Scrabble US word with a point value of 7
  • lumen is a valid Scrabble UK word with a point value of 7
  • lumen is a valid Words with friends word with a point value of 11

Definition of 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 (noun)

    Synonyms

    1. lm
  • a cavity or passage in a tubular organ (noun)

    Examples

    1. the lumen of the intestine

See definition of lumen in Merriam Webster