flint glass

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noun Optics.

an optical glass of high dispersion and a relatively high index of refraction, composed of alkalis, lead oxide, and silica, with or without other bases, sometimes used as the diverging lens component of an achromatic lens.

Origin of flint glass

First recorded in 1665–75
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British Dictionary definitions for flint glass

flint glass

noun

another name for optical flint, flint (def. 4)

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