lumen

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Lumen \Lu"men\, noun; 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.]

From WordNet (r) 3.0 (2006) [wn]:

lumen

noun

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"

1. Caduceus  2. Golden Key  3. Scales of Justice (Or maybe, 1. HEALTH 2. SECURITY 3. JUSTICE?)

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