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Wordnet 3.0

NOUN (1)

1. a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux;


WordNet (r) 3.0 (2006):

phot n 1: a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux