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Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.

Search results for 'lux':

lux noun (plural lux) physics in the SI system: a unit of illuminance, equal to one lumen per square metre.
ETYMOLOGY: 19c: Latin, meaning 'light'.