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palladium    音标拼音: [pəl'ediəm]
n. 钯



palladium
n 1: a silver-white metallic element of the platinum group that
resembles platinum; occurs in some copper and nickel ores;
does not tarnish at ordinary temperatures and is used
(alloyed with gold) in jewelry [synonym: {palladium}, {Pd},
{atomic number 46}]

Palladium \Pal*la"di*um\ (p[a^]l*l[=a]"d[i^]*[u^]m), n. [L., fr.
Gr. Palla`dion, fr. Palla`s, Palla`dos, Pallas.]
[1913 Webster]
1. (Gr. Antiq.) Any statue of the goddess Pallas; esp., the
famous statue on the preservation of which depended the
safety of ancient Troy.
[1913 Webster]

2. Hence: That which affords effectual protection or
security; a safeguard; as, the trial by jury is the
palladium of our civil rights. --Blackstone.
[1913 Webster]


Palladium \Pal*la"di*um\, n. [NL.] (Chem.)
A rare metallic element of the light platinum group, found
native, and also alloyed with platinum and gold. It is a
silver-white metal resembling platinum, and like it permanent
and untarnished in the air, but is more easily fusible, with
a melting point of 1555[deg] C. It can also be prepared as a
finely divided black powder. It is unique in its power of
absorbing hydrogen, which it does to the extent of nearly a
thousand volumes, forming the alloy {Pd2H}. It is used for
graduated circles and verniers, for plating certain silver
goods, and somewhat in dentistry. It was so named in 1804 by
Wollaston from the asteroid Pallas, which was discovered in
1802. Symbol Pd. Atomic number, 46. Atomic weight, 106.42.
Density 12.0.
[1913 Webster]


Pd \Pd\ prop. n.
The chemical symbol for {palladium}, an element of the
platinum group, of atomic number 46.

Syn: palladium.
[WordNet 1.5]

61 Moby Thesaurus words for "palladium":
aegis, arm guard, backstop, buffer, bulwark, bumper, contraceptive,
copyright, crash helmet, cushion, dashboard, dodger, face mask,
fender, finger guard, foot guard, fuse, goggles, governor, guard,
guardrail, hand guard, handrail, hard hat, helmet, insulation,
interlock, knee guard, knuckle guard, laminated glass,
life preserver, lifeline, lightning conductor, lightning rod, mask,
mudguard, nose guard, pad, padding, patent, pilot, preventive,
prophylactic, protective clothing, protective umbrella, safeguard,
safety, safety glass, safety plug, safety rail, safety shoes,
safety switch, safety valve, screen, seat belt, shield, shin guard,
sun helmet, umbrella, windscreen, windshield


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  • Palladium - Wikipedia
    Palladium is a chemical element; it has symbol Pd and atomic number 46 It is a rare and lustrous silvery-white metal discovered in 1802 by the English chemist William Hyde Wollaston He named it after the asteroid Pallas (formally 2 Pallas), which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas
  • Live USD Palladium Price Charts Historical Data | APMEX®
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  • Palladium | Uses, Properties, Facts | Britannica
    palladium (Pd), chemical element, the least dense and lowest-melting of the platinum metals of Groups 8–10 (VIIIb), Periods 5 and 6, of the periodic table, used especially as a catalyst (a substance that speeds up chemical reactions without changing their products) and in alloys
  • Palladium Price Today | Price of Palladium Per Ounce - KITCO
    Live Palladium Charts and Palladium Spot Price from International Palladium Markets, Prices from New York, London, Hong Kong and Sydney provided by Kitco
  • Palladium Mining In Alaska - The Diggings
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  • Anchorage, AK - America’s Largest Precious Metals Refiner — Elemetal
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  • Palladium Prices Today | Live Spot Palladium Price per Ounce - Monex
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  • Palladium Facts, Symbol, Discovery, Properties, Uses - Chemistry Learner
    Palladium (pronunciation peh-LAY-dee-em [2]), represented by the chemical symbol or formula Pd [1], is a rare, lustrous element belonging to the family of transition metals [3] Naturally occurring Pd is a mixture of 6 stable isotopes with mass numbers 102, 104, 105, 106, 108 and 110 [1, 3]
  • Palladium (Pd) – Definition, Preparation, Properties, Uses . . . - Examples
    Palladium is a lustrous, silvery-white metal that distinguishes itself through its unique properties and wide range of applications With the atomic number 46 Palladium is noteworthy for its excellent ability to absorb hydrogen, making it an essential material in hydrogen storage and purification technologies





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