SkyfireDict

lumen   (TTS Sound)

The noun lumen has 2 senses

• lumen, lm -- (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)


• lumen -- (a cavity or passage in a tubular organ; "the lumen of the intestine")