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Meaning of “lumen” in the English Dictionary

"lumen" in British English

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lumennoun [C]

uk   /ˈluː.mən/  us   /ˈluː.mən/ specialized
  • lumen noun [C] (UNIT OF LIGHT)

(abbreviation lm) physics a unit for measuring the amount of light something produces: a light bulb rated at 750 lumens
  • lumen noun [C] (IN BODY)

(plural lumina or lumens) medical the inside space of a tube-shaped organ in the body, for example a blood vessel or intestine: intestinal/vascular lumen
(Definition of lumen from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"lumen" in American English

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lumennoun [C]

 /ˈlu·mən/
physics, earth science the standard unit for measuring the brightness of a light, equal to the amount of light hitting one square foot of surface one foot away from the light
(Definition of lumen from the Cambridge Academic Content Dictionary © Cambridge University Press)
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“lumen” in British English

A bunch of stuff about plurals
A bunch of stuff about plurals
by ,
May 24, 2016
by Colin McIntosh One of the many ways in which English differs from other languages is its use of uncountable nouns to talk about collections of objects: as well as never being used in the plural, they’re never used with a or an. Examples are furniture (plural in German and many other languages), cutlery (plural in Italian), and

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