The Collaborative International Dictionary
Matted glass
Matted \Mat"ted\, a. [See Matte.] Having a dull surface; lusterless; unburnished; same as matte; as, matted gold leaf or gilding.
Matted glass, glass ornamented with figures on a dull ground.
Wiktionary
matted glass
n. glass ornamented with figures on a dull ground