holophote

[ hol-uh-foht, hoh-luh- ]
/ ˈhɒl əˌfoʊt, ˈhoʊ lə- /
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noun

an apparatus by which practically all the light from a lighthouse lamp or the like is thrown in a desired direction.

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. 2019

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