burning glass

burning glass
burning glass
a convex lens for focusing the sun's rays so as to produce heat or set fire to something

English World dictionary. . 2014.

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  • Burning glass — Burning Burn ing, n. The act of consuming by fire or heat, or of subjecting to the effect of fire or heat; the state of being on fire or excessively heated. [1913 Webster] {Burning fluid}, any volatile illuminating oil, as the lighter petroleums… …   The Collaborative International Dictionary of English

  • Burning-glass — A burning glass is a large convex lens that can concentrate the sun s rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface. They were used in 18th century chemical studies for burning materials in… …   Wikipedia

  • burning glass — lens of glass which causes combustion by focusing the sun s rays …   English contemporary dictionary

  • burning-glass — burnˈing glass noun A convex lens concentrating the sun s rays at its focus to produce fire or heat • • • Main Entry: ↑burn …   Useful english dictionary

  • burning glass — a converging lens used to produce heat or ignite substances by focusing the sun s rays. Also called sunglass. [1560 70] * * * …   Universalium

  • burning-glass — noun /ˈbəːnɪŋɡlɑːs/ A magnifying lens, as used to focus sunlight on to an object …   Wiktionary

  • burning glass — noun a lens for concentrating the sun s rays on an object so as to set fire to it …   English new terms dictionary

  • burning-glass — n. Convex lens …   New dictionary of synonyms

  • burning-glass — /ˈbɜnɪŋ glas/ (say berning glahs) noun a convex lens used to produce heat or ignite substances by focusing the sun s rays …  

  • burning glass — noun : a positive lens for producing intense heat by converging the sun s rays approximately to the principal focus of the lens the point of convergence being a very small image of the sun …   Useful english dictionary

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