lumen

名词 lumen:

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
   同义词：lm
2. a cavity or passage in a tubular organ

lu.men

n.（名词）
【复数】 lu.mens 或 lu.mi.na [-m…-n…]
Anatomy The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.
【解剖学】 腔：管状器官的内部腔室或腔，窝，比如在血管或肠中的腔
Abbr. lmPhysics The unit of luminous flux in the International System, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions.See table at measurement
缩写 lm【物理学】 流明（光通量单位）：国际度量系统中的光通量单位，等于一烛光的均匀点光源在单位主体角内发出的光通量参见 measurement
Botany The cavity bounded by a plant cell wall.
【植物学】 （管）腔：细胞壁周围的空间

来源：
Latin [an opening, light] * see leuk-
拉丁语 [开口，光] *参见 leuk-

【引伸】
lu.menal 或
lu.minal
adj.（形容词）