optical flint

noun

an optical glass of high dispersion and high refractive index containing lead oxide. They are used in the manufacture of lenses, artificial gems, and cut glassAlso called: flint glass

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a granular metamorphic rock.
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Words nearby optical flint

optical disk, optical double star, optical effects, optical fiber, optical fibre, optical flint, optical glass, optical illusion, optical image, optical isomer, optical isomerism
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