prism glass
Noun
Meaning
prism glass (uncountable)
Glass with one smooth side and the other side formed into sharp-edged ridges so as to reflect the light that passes through, used at windows to throw the light into the interior.
Noun
prism glass (uncountable)
Glass with one smooth side and the other side formed into sharp-edged ridges so as to reflect the light that passes through, used at windows to throw the light into the interior.