LUMEN


Meaning of LUMEN in English

/looh"meuhn/ , n. , pl. lumens, lumina /-meuh neuh/ .

1. 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. Abbr.: lm

2. Anat. the canal, duct, or cavity of a tubular organ.

3. Bot. (of a cell) the cavity that the cell walls enclose.

[ 1870-75; lumen (s. lumin- ) light, window ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .