An Etymological Dictionary of Astronomy and Astrophysics

A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides.

Etymology (EN): From O.E. glæs, from W.Gmc. *glasam (M.Du. glas, Ger. Glas), from PIE base *gel-/*ghel- “to shine, glitter.”

Etymology (PE): Šišé “glass;” Mid.Pers. šišag.