WordMate - 在线英语词典

lumen 'lu:min

GRE

释义

n. 流明, 腔
[医] 腔, 流明(光通单位)

英文释义

n. 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
n. a cavity or passage in a tubular organ

词形变化

复数: lumens

BNC词频排名: 18,116 | 当代语料库词频排名: 25,456