lux

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a unit of illumination equal to 1 lumen per square meter; 0.0929 foot candle

Etymology

Borrowed from Latin lūx (“light”), from Proto-Indo-European *lewk- (“white; light; bright”). Cognates include Ancient Greek λευκός (leukós, “white, blank, light, bright, clear”), Ancient Greek λύκη (lúkē, “light, morning twilight”), Sanskrit रोचते (rocate), Middle Persian 𐭩𐭥𐭬 (rōz, “day”) and Old English lēoht (noun) (English light).

In classic literature

Synonyms

lx

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