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

lemnu nlume enlum menlu umenl