silica [ˈsɪlɪkə]
n
1. (Chemistry / Elements & Compounds) the dioxide of silicon, occurring naturally as quartz, cristobalite, and tridymite. It is a refractory insoluble material used in the manufacture of glass.
CinemaScope [ˈsɪnɪməˌskəʊp]
n
(Performing Arts)™ an anamorphic process of wide-screen film projection