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
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