Link Centre Dictionary

lumen

lu·men

UK/ˈluːmən/ US/ˈlumən/ rare

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

Synonyms
2.

a cavity or passage in a tubular organ

  • “the lumen of the intestine”

Origin

Borrowed from Latin lūmen (“light, an opening”). Use as a unit was first adopted by French physicist André Blondel in 1894.

Phrases

  • lumen method
  • lumen second

Related words

Broader terms

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.