lumen

Tanımlar (İngilizce)

1. isim In the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm.
2. isim The cavity or channel within a tube or tubular organ.
3. isim The cavity bounded by a plant cell wall.
4. isim The bore of a tube such as a hollow needle or catheter.