Transcription
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- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
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- [loo-muh n]
- /ˈlu mən/
- /ˈluː.mən/
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- US Pronunciation
- US IPA
-
- [loo-muh n]
- /ˈlu mən/
Definitions of lumen word
- noun plural lumen Optics. the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbreviation: lm. 1
- noun plural lumen Anatomy. the canal, duct, or cavity of a tubular organ. 1
- noun plural lumen Botany. (of a cell) the cavity that the cell walls enclose. 1
- noun lumen The SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela. 1
- noun lumen unit of light flow 1
- noun lumen the derived SI unit of luminous flux; the flux emitted in a solid angle of 1 steradian by a point source having a uniform intensity of 1 candela 0
Information block about the term
Origin of lumen
First appearance:
before 1870 One of the 26% newest English words
1870-75; < New Latin, special uses of Latin lūmen (stem lūmin-) light, window
Historical Comparancy
Parts of speech for Lumen
noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
lumen popularity
A common word. It’s meaning is known to most children of preschool age. About 87% of English native speakers know the meaning and use the word.
Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".
lumen usage trend in Literature
This diagram is provided by Google Ngram ViewerTop questions with lumen
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- what is a lumen compared to candlepower?
- how much is 1 lumen?