Platinum Definition

plătn-əm
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
Webster's New World
A medium to light gray.
American Heritage
A trademark for a certification indicating that a recording, such as an album of music, has sold a million copies.
American Heritage

A whitish grey colour, like that of the metal.

Wiktionary
Synonyms:
atomic number 78pt
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
Webster's New World
Of a whitish grey colour, like that of the metal.
Wiktionary
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other
A metal that has a variety of uses in jewelry and industrial applications. Just over half of its demand comes from jewelry production, while automotive catalyst uses take up about one-third and chemical and petroleum refining takes up about 13 percent. The remainder of its demand comes from the computer industry and high-technology applications. Platinum is one of the world’s scarcest materials. Eighty percent of platinum supply comes from South Africa, about 10 percent from Russia, and the rest from North America. Futures and options contracts for platinum trade on the New York Mercantile Exchange, as well as other exchanges around the world. Platinum is the principal member of a six-metal group called platinum group metals (PGM). The other members of the group are palladium, rhodium, ruthenium, osmium, and iridium. All have chemical and physical qualities that make them vital industrial materials.
Webster's New World Finance

Other Word Forms of Platinum

Noun

Singular:
platinum
Plural:
platinums

Origin of Platinum

  • Spanish platina (“little silver"), because platinum was found as an apparent impurity with silver.

    From Wiktionary

  • New Latin from Spanish platina platinum platina

    From American Heritage Dictionary of the English Language, 5th Edition

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