this amount can become enflamed, ruptured which then kills. It is possible to have a considerable amount of plaque with no symptoms because the hole also known as the lumen allows complete flow of blood. Lifetime typically refers to the useful time of light output, also referred to as lumen maintenance. This conscience, unlike the voice of God or what later thinkers called lumen naturale, gives no positive prescriptions it only tells us what not to do, what to avoid in our actions and dealings with others, as well as what to repent of.Ĭommercially available units have broken the killer 100 lumens per Watt (lm/W) luminous efficacy barrier (the "lumen" is the standard unit of luminous flux-useful light output-while "efficacy" is the ratio of light output to power and measures the efficiency of the bulb). Lighting the Big Apple With L.E.D.’s - Bits Blog. They must be sealed to avoid moisture and kept clean to maintain lumen maintenance. Latin vocabulary of that time this external agent was designated by the term lumen while lux was used to indicate its mental representation. noun 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.noun a cavity or passage in a tubular organ.noun medicine The bore of a tube such as a hollow needle or catheter.įrom WordNet 3.0 Copyright 2006 by Princeton University.noun botany The cavity bounded by a plant cell wall.noun anatomy The cavity or channel within a tube or tubular organ.noun physics In the International System of Units, the derived unit of luminous flux the light that is emitted in a solid angle of one steradian from a source of one candela.a tubular cavity a vacuole.įrom Wiktionary, Creative Commons Attribution/Share-Alike License. noun (Biol.) An opening, space, or cavity, esp.noun A unit of light flux, being the flux through one square meter of surface the illumination of which is uniform and of unit brightness.noun 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. noun The hollow tube of an operating-needle or of a hypodermic syringe.įrom the GNU version of the Collaborative International Dictionary of English.noun The unit of flux of light the flux of light in a beam subtending unit solid angle where the source has an intensity of one hefner.noun In botany, the internal cavity, or space within the wall, of a cell.noun An opening or passageway, as, in anatomy, of a hollow tubular organ: as, the lumen of the intestine or of a blood-vessel.noun Physics The SI unit of luminous flux, equal to the amount of light passing through a solid angle per unit time from a light source of one candela intensity radiating equally in all directions.noun Biology The interior of a membrane-bound compartment or organelle in a cell.noun Anatomy The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.From The American Heritage® Dictionary of the English Language, 5th Edition.
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