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burning glass

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noun
  1. a converging lens used to produce heat or ignite substances by focusing the sun's rays.

Origin of burning glass

First recorded in 1560–70
Also called sunglass.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for burning glass

Historical Examples

  • The scope also concentrates like a burning-glass and magnifies the power of the light.

    They Twinkled Like Jewels

    Philip Jos Farmer

  • He also gives descriptions of the camera obscura and of the burning-glass.

    Stories of Invention

    Edward E. Hale

  • The burning-glass was not connected in any way with the development of the match.

    Stories of Useful Inventions

    Samuel Eagle Foreman

  • It was a magnificent day, the sun dazzled, and the bay sparkled like a burning-glass.

    The White Scalper

    Gustave Aimard

  • A burning-glass had been fastened to the crucifix, and with that he had destroyed the idol.


British Dictionary definitions for burning glass

burning glass

noun
  1. a convex lens for concentrating the sun's rays into a small area to produce heat or fire
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012