അർത്ഥം : 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.
പര്യായപദങ്ങൾ : lm
അർത്ഥം : A cavity or passage in a tubular organ.
ഉദാഹരണം :
The lumen of the intestine.