lumen plural
lu·men
The plural form of lumen is lumens
L lDefinitions
- noun plural lumen Optics. the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbreviation: lm. 1
- noun plural lumen Anatomy. the canal, duct, or cavity of a tubular organ. 1
- noun plural lumen Botany. (of a cell) the cavity that the cell walls enclose. 1