Lumen
9 definitions retrieved  Lumen \Lu"men\, n.; pl. L. Lumina, E. Lumens. [L., light, an opening for light.] 1. (Photom.) (a) A unit of illumination, being the amount of illumination of a unit area of spherical surface, due to a light of unit intensity placed at the center of the sphere. (b) A unit of light flux, being the flux through one square meter of surface the illumination of which is uniform and of unit brightness. [Webster 1913 Suppl.] 2. (Biol.) An opening, space, or cavity, esp. a tubular cavity; a vacuole. [Webster 1913 Suppl.]  lumen n 1: a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions [syn: lumen, lm] 2: a cavity or passage in a tubular organ; "the lumen of the intestine"  lumen [luːmən] Einheit des Lichtstromes  lumen 1. flux  lumen Licht  lumen light  lumen Lumen n; Einheit des Lichtstromes [phys.]  Lumen n lumen  32 Moby Thesaurus words for "lumen": ASA scale, British candle, Hefner candle, Scheiner scale, bougie decimale, candle, candle lumen, candle power, candle-foot, candle-hour, candle-meter, decimal candle, exposure meter, flux, foot-candle, intensity, international candle, lamp-hour, light, light meter, light quantum, lumen meter, lumen-hour, lumeter, luminous flux, luminous intensity, luminous power, lux, photon, quantum, unit of flux, unit of light Lumen related |
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