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holophote

[hol-uh-foht, hoh-luh-]
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noun
  1. an apparatus by which practically all the light from a lighthouse lamp or the like is thrown in a desired direction.
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Origin of holophote

1840–50; back formation from holophotal (holo- + -photal); see photic, -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for holophote

Historical Examples

  • The focus observer is shown on the lamp in holophote, Fig. 172.

    Torpedoes and Torpedo Warfare

    C. W. Sleeman

  • The catadioptric lens, or holophote, gives a far more powerful but a more concentrated beam than the parabolic reflector.