optical glass

English

Etymology

optical +‎ glass from being the type of glass used for optics

Noun

optical glass (countable and uncountable, plural optical glasses)

A class of glass used to create optical lenses, such as that for spectacles or spyglasses

Hyponyms

crown glass
flint glass
natural glass (optometry) ("glass" (not plastic) lens glass for eyeglasses)

See also

organic glass (plastic lens plastics)

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