🇯🇵Japanese Source WordCode: JA

ルクス

Pronunciation / Transliteration: rukusu

🇬🇧 Direct English Meaning:
Lux/lʌks/
nounCEFR C1 (Advanced)Top #8500 frequency
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🇯🇵 Example Sentence in Japanese:

"ルクスは照度のSI組立単位である。"

Comprehensive Definitions & Senses

1 sense
As noun
  1. 1

    The SI derived unit of illuminance and luminous emittance, measuring luminous flux per unit area equal to one lumen per square metre.

    "The light meter measured the desk illumination at five hundred lux."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived directly from the Latin noun 'lux', meaning 'light', which traces back to the Proto-Indo-European root '*lewk-', meaning 'to shine' or 'brightness'. In the 20th century, it was formally adopted as the SI derived unit of illuminance.

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