lumen
pronunciation
How to pronounce lumen in British English:
UK [ˈlu:men]
How to pronounce lumen in American English:
US [ˈlumən]
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- 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
- a cavity or passage in a tubular organ
Word Origin
- lumen (n.)
- unit of luminosity, 1897, coined 1894 by French physicist André-Eugène Blondel (1863-1938) from Latin lumen "light," related to lucere "to shine" (see light (n.)).
Example
- 1. Lumen depreciation is the decrease in lumen output that occurs as a lamp operates .
- 2. The lumen is large , without any narrowing by atheromatous plaque .
- 3. Coronary arterial lumen has obvious the dark blood clots .
- 4. Find worms in the lumen of abomasum or intestine .
- 5. A former luminance unit equal to one lumen per square foot .