palladium definition

  • noun:
    • A soft, ductile, steel-white, tarnish-resistant, metallic factor occurring obviously with platinum, particularly in gold, nickel, and copper ores. Because it can soak up huge amounts of hydrogen, its used as a purification filter for hydrogen and a catalyst in hydrogenation. It really is alloyed for use in electric connections, jewellery, nonmagnetic watch components, and medical devices. Atomic number 46; atomic fat 106.4; melting point 1,552°C; boiling point 3,140°C; specific gravity 12.02 (20°C); valence 2, 3, 4. See Table at factor.
    • A safeguard, specially one seen as an assurance of the integrity of personal institutions: the Bill of Rights, palladium of American civil liberties.
    • A sacred item that was believed to have the capacity to preserve a city or condition possessing it.
    • A safeguard (from a statue of Athena which was thought to safeguard the old city of Troy).
    • A metallic chemical element (sign Pd) with an atomic wide range of 46.
    • Any statue of this goddess Pallas; esp., the popular statue from the conservation which depended the safety of old Troy.
    • That which affords effectual protection or protection; a safeguard.
    • A rare metallic section of the light platinum team, discovered indigenous, and alloyed with platinum and silver. It's a silver-white steel resembling platinum, and like it permanent and untarnished in the air, but is easier fusible, with a melting point of 1555° C. it is also prepared as a finely divided black powder. It is special in its energy of taking in hydrogen, which it will into the level of nearly a lot of volumes, creating the alloy Pd2H. It's utilized for graduated groups and verniers, for plating certain silver items, and notably in dental care. It was so named in 1804 by Wollaston from the asteroid Pallas, which was discovered in 1802. Expression Pd. Atomic quantity, 46. Atomic fat, 106.42. Density 12.0.
    • A statue or picture associated with the goddess Pallas; specifically, in art and legend, a xoanon picture. Regarding conservation of such a picture, according to the legend, depended the security of Troy.
    • 2. something thought or respected to pay for effectual security, protection, and security: as, test by jury could be the palladium of your civil-rights.
    • Chemical expression, Pd; atomic weight, 106.5. One of the uncommon metals associated with platinum.
    • a silver-white metallic part of the platinum group that resembles platinum; does occur in certain copper and nickel ores; will not tarnish at ordinary temperatures and is used (alloyed with silver) in jewelry

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