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burning glass

American  

noun

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


burning glass British  

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

Etymology

Origin of burning glass

First recorded in 1560–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

He and I know to move around them by sheer memory; the burning glass promises to singe the skin if touched.

From The Guardian Apr. 17, 2018

The film begins with a helicoptic view, swooping over the dome of St. Peter's, then briefly darts away to Greece to catch the sun's rays igniting the traditional torch through a burning glass at Olympia.

From Time Magazine Archive

The big burning glass is not a new idea.

From Time Magazine Archive

Suddenly the public gaze converged on them like sunlight through a burning glass, and their names blazed into lights.

From Time Magazine Archive

His fire had gone out, but he had no difficulty in lighting it by means of his burning glass.

From The Rival Crusoes by Kingston, William Henry Giles

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