Meaning of lumen
Pronunciation: (l'mun), [key]
— pl. -mens, -mi•na
- the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbr.: lm
- the canal, duct, or cavity of a tubular organ.
- (of a cell) the cavity that the cell walls enclose.
- lumen (Thesaurus)