FluentPlex
Type an English word in any form (went, children, happier).

luminosity

noun C2
  1. the state of being luminous, or a luminous object; brilliance or radiance (uncountable)
  2. the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor (countable, uncountable)
  3. The rate at which a star radiates energy in all directions. (countable, uncountable)

Plural luminosities

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.