• Webster's Revised Unabridged Dictionary
    • n Holophote A lamp with lenses or reflectors to collect the rays of light and throw them in a given direction; -- used in lighthouses.
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Century Dictionary and Cyclopedia
    • n holophote The improved form of optical apparatus now used in lighthouses, by which practically all the light from the lamp or other source is made available for the desired effect of illumination. It may consist of mirrors to reflect the light (catoptric holophote), of lenses to refract it (dioptric holophote), or, better, of a combination of both reflection and refraction (catadioptric holophote).
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Chambers's Twentieth Century Dictionary
    • n Holophote hol′o-fōt an improved optical apparatus now used in lighthouses, by which all the light from the lamp is thrown in the required direction, in the catoptric holophote by reflectors, in the dioptric by refracting lenses, in the catadioptric by both combined
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Chambers's Twentieth Century Dictionary
Gr. holos, whole, phōs, phōtos, light.


In literature:

Associated Words: holophote, pharology.
"Putnam's Word Book" by Louis A. Flemming
A fixed holophote is placed inside the optic in the dark or landward arc, and at the focal plane of the lamp.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various