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platinum
noun
a silver-colored, malleable, ductile, metallic chemical element that is highly resistant to corrosion and tarnish, used as a chemical catalyst, for acid-proof containers, ignition fuses, jewelry, dental alloys, etc.: symbol, Pt; at. no., 78
adjective
☆ designating a record, tape, disc, video, etc. which has registered sales of a specified number, as two million, or value, as $1,000,000: platinum reflects a greater number or value than gold
See platinum in American Heritage Dictionary 4
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