burning glass


noun

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

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Origin of burning glass

First recorded in 1560–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for burning glass

British Dictionary definitions for burning glass

burning glass

noun

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