Top definition
1 : the cavity of a tubular organ or part the lumen of a blood vessel
2 : the bore of a tube (as of a hollow needle or catheter)
3 : a unit of luminous flux equal to the light emitted in a unit solid angle by a uniform point source of one candle intensity
The ReVolt is waterproof and rechargeable with a whopping 300 lumens at full power.
by Bonzai May 31, 2018
Get the mug
Get a lumen mug for your mate Jerry.
buy the domain for your recipe blog