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