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🇨🇳Chinese Source WordCode: ZH

流明

Native Script:中文汉字

Pronunciation / Transliteration: liú míng

🇬🇧 Direct English Meaning:
Lumen/ˈluː.mən/
nounCEFR C1 (Advanced)Top #8500 frequency
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🇨🇳 Example Sentence in Chinese:

"这款投影仪的亮度为一千流明。"

Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The SI derived 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.

    "The new LED projector produces over three thousand lumens of brightness."
  2. 2

    The inside space of a tubular structure, such as an artery or intestine in anatomy.

    "A blockage in the arterial lumen can significantly restrict blood flow."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Latin word 'lumen', meaning 'light', 'opening', or 'window', tracing back to the Proto-Indo-European root '*lewk-', meaning 'to shine, be bright'. In the mid-19th century, it was formally adopted into scientific nomenclature as the SI unit for luminous flux.

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