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holophote

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

noun

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

Etymology

Origin of holophote

1840–50; back formation from holophotal ( holo- + -photal ); photic, -al 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.