optical glass

1. 1.

   clear homogeneous glass of known refractive index; used to make lenses

   Broaderglass

   Narroweroptical crownoptical flint

Questions about optical glass

What does optical glass mean?

optical glass means "clear homogeneous glass of known refractive index; used to make lenses".

Is optical glass a common word?

optical glass is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.