cold light

English

Noun

cold light (countable and uncountable, plural cold lights)

  1. (biology, physics) A light emitted from a source that does not produce significant heat.
    • 1961, Jean-Henri Fabre, Edwin Way Teale (contributor), The Insect World of J. Henri Fabre in the Translation of Alexander Teixeira de Mattos, page 313:
      The centuries-old mystery of the cold light produced by the Firefly and the Glow-Worm is still partially a riddle.
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