首页英语词典lumenlumen英英释意

lumen

英 ['luːmen] 美['lumɛn]
  • n. 流明(光束的能量单位);(管状器官内的)内腔

英英释意


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
2. a cavity or passage in a tubular organ;
"the lumen of the intestine"