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pal·la·di·um 1

n. Symbol Pd
A soft, ductile, lustrous gray-white, tarnish-resistant, metallic element occurring naturally with platinum, especially in gold, nickel, and copper ores. Because it can absorb large amounts of hydrogen, it is used as a purification filter for hydrogen and a catalyst in hydrogenation. It is alloyed for use in electric contacts, jewelry, nonmagnetic watch parts, and surgical instruments. Atomic number 46; atomic weight 106.4; melting point 1,554.8°C; boiling point 2,963°C; specific gravity 12.02 (20°C); valence 2, 3, 4. See Periodic Table.

[From Pallas (discovered at the same time as the element).]

pal·la·di·um 2

n. pl. pal·la·di·a (-dē-ə) or pal·la·di·ums
1. A safeguard, especially one viewed as a guarantee of the integrity of social institutions: the Bill of Rights, palladium of American civil liberties.
2. A sacred object that was believed to have the power to preserve a city or state possessing it.

[Middle English Palladion, a statue of Pallas Athena believed to protect Troy, from Old French palladion, from Latin Palladium, from Greek Palladion, from Pallas, Pallad-, Pallas Athena.]


(Elements & Compounds) a ductile malleable silvery-white element of the platinum metal group occurring principally in nickel-bearing ores: used as a hydrogenation catalyst and, alloyed with gold, in jewellery. Symbol: Pd; atomic no: 46; atomic wt: 106.42; valency: 2, 3, or 4; relative density: 1202; melting pt: 1555°C; boiling pt: 2964°C
[C19: named after the asteroid Pallas, at the time (1803) a recent discovery]


something believed to ensure protection; safeguard
[C17: after the Palladium]


(Classical Myth & Legend) a statue of Pallas Athena, esp the one upon which the safety of Troy depended


(pəˈleɪ di əm)

a rare silver-white ductile metallic element of the platinum group, used chiefly as a catalyst and in dental and other alloys. Symbol: Pd; at. wt.: 106.4; at. no.: 46; sp. gr.: 12 at 20°C.
[1803; after the asteroid Pallas, then newly discovered; see Palladium, -ium2]
pal•lad′ic (-ˈlæd ɪk) pal•la′dous (pəˈleɪ dəs, ˈpæl ə dəs) adj.


(pəˈleɪ di əm)

n., pl. -di•a (-di ə)
1. a statue of Athena, esp. one on the citadel of Troy on which the safety of the city was supposed to depend.
2. (usu. l.c.) anything believed to provide protection or safety; safeguard.
[< Latin Palladium < Greek Palládion, n. use of neuter of Palládios of Pallas, derivative of Pallás, s. Pallad- Pallas]


Symbol Pd An easily shaped, grayish-white metallic element that occurs naturally with platinum. Because it can absorb large amounts of hydrogen, it is used as a catalyst in reactions involving hydrogen. Palladium and its alloys are used to make electrical contacts and jewelry. Atomic number 46. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.palladium - a silver-white metallic element of the platinum group that resembles platinumpalladium - 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
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.


[pəˈleɪdɪəm] Npaladio m


n (Chem) → Palladium nt


n paladio
References in classic literature ?
Well, Laurence, if our oaken chair, like the wooden palladium of Troy, was connected with the country's fate, yet there appears to have been no supernatural obstacle to its removal from the Province House.
That is true," said Don Quixote, and, taking a handkerchief out of his pocket, he begged the Distressed One to bandage his eyes very carefully; but after having them bandaged he uncovered them again, saying, "If my memory does not deceive me, I have read in Virgil of the Palladium of Troy, a wooden horse the Greeks offered to the goddess Pallas, which was big with armed knights, who were afterwards the destruction of Troy; so it would he as well to see, first of all, what Clavileno has in his stomach.
The exception in favor of the equality of suffrage in the Senate, was probably meant as a palladium to the residuary sovereignty of the States, implied and secured by that principle of representation in one branch of the legislature; and was probably insisted on by the States particularly attached to that equality.
The friends and adversaries of the plan of the convention, if they agree in nothing else, concur at least in the value they set upon the trial by jury; or if there is any difference between them it consists in this: the former regard it as a valuable safeguard to liberty; the latter represent it as the very palladium of free government.
He put this second one so perseveringly that a stool and twelve shillings a week were at last found for Tip in the office of an attorney in a great National Palladium called the Palace Court; at that time one of a considerable list of everlasting bulwarks to the dignity and safety of Albion, whose places know them no more.
Other dispersed fragments of the same great palladium are to be found on the canals of Venice, at the second cataract of the Nile, in the baths of Germany, and sprinkled on the sea-sand all over the English coast.
Palladium has gained ground over that period while the value for platinum has dropped steadily.
We'll share with you the best science regarding Pd-P electroless palladium, also non-phosphorus electroless palladium, and immersion palladium:
The big precious metals story of this year and last year is palladium, says Gerhard Schubert, Head of Commodities for Emirates NBD.
In 1997, Russia shocked the market by holding up shipments and over the next four years palladium increased to a high of $1,130 a tonne.
This transaction is the first between Palladium USA and GE Real Estate.
In a July 14 release, North American Palladium says the second quarter marked the first complete quarter of production from the underground mine which began full production on April 1.