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burning glass

noun
1.
a converging lens used to produce heat or ignite substances by focusing the sun's rays.
Also called sunglass.
Origin of burning glass
1560-1570
1560-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for burning-glass
Historical Examples
  • The burning-glass concentrating the sun's rays on the red precipitate, being Priestley's original experiment.

    The Boy's Playbook of Science John Henry Pepper
  • He also gives descriptions of the camera obscura and of the burning-glass.

    Stories of Invention Edward E. Hale
  • You can see how this is done with an ordinary magnifying glass, or burning-glass.

    A Handbook of Health Woods Hutchinson
  • It was a magnificent day, the sun dazzled, and the bay sparkled like a burning-glass.

    The White Scalper Gustave Aimard
  • It was on that day that things began to come to a focus, a burning-glass of events that seemed to center on me.

    The Man in Lower Ten Mary Roberts Rinehart
  • A burning-glass had been fastened to the crucifix, and with that he had destroyed the idol.

  • Try the experiment of concentrating on a thermoscope, by means of a burning-glass, the moon's rays.

  • In China the burning-glass was widely used not very long ago.

  • Out of the saucepan shot a ball of fire like a flash of lightning; the next minute the burning-glass ceased to work.

    Black Diamonds Mr Jkai
  • The Duke's burning-glass was the instrument used to apply heat to the diamond.

    Six Lectures on Light John Tyndall
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
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10
15
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