flint glass

noun

, Optics.

1. 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.

flint glass

noun

1. another name for optical flint flint

Word History and Origins

Origin of flint glass¹

First recorded in 1665–75

Example Sentences

For general purposes flint glass is vastly superior to the soft soda mentioned above.

From Project Gutenberg

Apparatus made of flint glass is less liable to crack and break at places of unequal thickness than if made of soda glass.

From Project Gutenberg

It should also be mentioned that flint glass has a much more brilliant appearance than soda glass.

From Project Gutenberg

With soda glass a very small irregularity will cause the joint to break when cold, but flint glass is much more long-suffering.

From Project Gutenberg

The flint-glass tube is then fused down upon the platinum wire, care being taken to avoid the presence of air bubbles.

From Project Gutenberg