a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
[kwawrt-sif-er-uh s] /kwɔrtˈsɪf ər əs/ adjective 1. consisting of or containing : quartziferous rock. /kwɔːtˈsɪfərəs/ adjective 1. containing or composed of quartz
[kwawrt-sahyt] /ˈkwɔrt saɪt/ noun 1. a granular metamorphic rock consisting essentially of in interlocking grains. /ˈkwɔːtsaɪt/ noun 1. a very hard metamorphic rock consisting of a mosaic of intergrown quartz crystals 2. a white or grey sandstone composed of quartz n. 1837, from quartz + -ite. quartzite (kwôrt’sīt’) A metamorphic rock consisting entirely of quartz. […]
noun 1. a lamp consisting of an ultraviolet light source, as mercury vapor, contained in a fused-silica bulb that transmits ultraviolet light with little absorption.
[kwawrts] /kwɔrts/ noun 1. one of the commonest minerals, silicon dioxide, SiO 2 , having many varieties that differ in color, luster, etc., and occurring either in masses (as agate, bloodstone, chalcedony, jasper, etc.) or in crystals (as rock crystal, amethyst, citrine, etc.): the chief constituent of sand and sandstone, and an important constituent of […]