- Lumen (unit) , the SI unit of luminous flux
- 141 Lumen , an asteroid discovered by the French astronomer Paul Henry in 1875
- Lumen (anatomy) , the cavity or channel within a tubular structure, such as the vascular lumen of a blood vessel or the lumen of a seminiferous tubule
- Thylakoid Lumen , the inner membrane space of the chloroplast.
: See also: Lux .
|
