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Palladium   /pəlˈeɪdiəm/   Listen
noun
Palladium  n.  
1.
(Gr. Antiq.) Any statue of the goddess Pallas; esp., the famous statue on the preservation of which depended the safety of ancient Troy.
2.
Hence: That which affords effectual protection or security; a safeguard; as, the trial by jury is the palladium of our civil rights.



Palladium  n.  (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° 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.






Collaborative International Dictionary of English 0.48








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"Palladium" Quotes from Famous Books



... average of those of their constituents. An alloy of a metal with mercury is termed an amalgam. An important application in electricity is the use of fusible alloys for fire alarms or for safety fuses. German silver is also of importance for resistance coils, and palladium alloys are used for unmagnetizable watches. An alloy of wrought iron with manganese is almost unmagnetizable, and has been proposed for use in ship building to avoid ...
— The Standard Electrical Dictionary - A Popular Dictionary of Words and Terms Used in the Practice - of Electrical Engineering • T. O'Conor Slone

... of the hierarchic usages, nevertheless assume! The oath of supremacy became indispensable even for places at court and in the country districts, in which it had not hitherto been required. Men deemed the Queen's ecclesiastical power the palladium of ...
— A History of England Principally in the Seventeenth Century, Volume I (of 6) • Leopold von Ranke

... and their king. The former consisted of sacred horses and cars; perhaps, in the later times, of silver altars also, bearing the perpetual and heaven-kindled fire, which was a special object of Persian religious regard, and which the superstition of the people viewed as a sort of palladium, sure to bring the blessings of heaven upon their arms. Behind the sacred emblems followed the Great King himself, mounted on a car drawn by Nissean steeds, and perhaps protected on either side by a select band of his relatives. Behind the royal chariot came a second guard, consisting, like ...
— The Seven Great Monarchies Of The Ancient Eastern World, Vol 5. (of 7): Persia • George Rawlinson

... must be considered as the palladium of our security, and the first effectual resort in case of hostility. It is essential, therefore, that the same system should pervade the whole; that the formation and discipline of the militia of the continent should be ...
— Life And Times Of Washington, Volume 2 • John Frederick Schroeder and Benson John Lossing

... eye, Fixed, unerring, sleepless, bright, Watch, when danger hovers nigh, From his lofty mountain height; While the stripes and stars shall wave O'er this treasure, pure and free— The land's Palladium, it shall save The home and shrine ...
— The Liberty Minstrel • George W. Clark


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