Defenition of the word lumen

• Defenition of the word lumen

  • The SI unit of luminous flux, with symbol "lm".
  • The inside space of a tubular structure.
  • 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
  • a cavity or passage in a tubular organ; "the lumen of the intestine"
  • a cavity or passage in a tubular organ

Synonyms for the word lumen

• • lm

Hypernyms for the word lumen

• • bodily cavity
  • cavity
  • cavum
  • luminous flux unit

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