Dictionary.com
Thesaurus.com
Jump To:
  • palladium
    palladium
    noun
    a rare metallic element of the platinum group, silver-white, ductile and malleable, harder and fusing more readily than platinum: used chiefly as a catalyst and in dental and other alloys. Pd; 106.4; 46; 12 at 20°C.
  • Palladium
    Palladium
    noun
    Also Palladion a statue of Athena, especially one on the citadel of Troy on which the safety of the city was supposed to depend.

palladium

1 American  
[puh-lay-dee-uhm] / pəˈleɪ di əm /

noun

Chemistry.
  1. a rare metallic element of the platinum group, silver-white, ductile and malleable, harder and fusing more readily than platinum: used chiefly as a catalyst and in dental and other alloys. Pd; 106.4; 46; 12 at 20°C.


Palladium 2 American  
[puh-lay-dee-uhm] / pəˈleɪ di əm /

noun

  • Palladia
    plural
  1. Also Palladion a statue of Athena, especially one on the citadel of Troy on which the safety of the city was supposed to depend.

  2. (usually lowercase) anything believed to provide protection or safety; safeguard.


Palladium 1 British  
/ pəˈleɪdɪəm /

noun

  1. a statue of Pallas Athena, esp the one upon which the safety of Troy depended

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

palladium 2 British  
/ pəˈleɪdɪəm /

noun

  1. something believed to ensure protection; safeguard

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

palladium 3 British  
/ pəˈleɪdɪəm /

noun

  1. 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

palladium Scientific  
/ pə-lā′dē-əm /
  1. A malleable, ductile, grayish-white metallic element that occurs naturally with platinum. It is used as a catalyst in hydrogenation and in alloys for making electrical contacts and jewelry. Atomic number 46; atomic weight 106.4; melting point 1,552°C; boiling point 3,140°C; specific gravity 12.02 (20°C); valence 2, 3, 4.

  2. See Periodic Table


Other Word Forms

Noun Inflected Forms

Etymology

Origin of palladium1

Special use of Palladium; named (1803) after the asteroid Pallas, then newly discovered; see -ium

Origin of Palladium2

< Latin Palladium < Greek Palládion, noun use of neuter of Palládios of Pallas, equivalent to Pallad- (stem of Pallás ) Pallas + -ios adj. suffix

Explanation

Palladium is an extremely valuable precious metal. Closely related to platinum, palladium is also silvery-white and shiny. When William Hyde Wollaston discovered palladium in 1803, he named it after one of the largest known asteroids, Pallas. Earlier, the word had been used to mean "a source of protection," inspired by the Greek goddess Athena, who was commonly referred to as Pallas. The precious metal shares chemical properties with many others, and it's used to clean the exhaust from cars, as well as in jewelry and electronics.

Keep Reading on Vocabulary.com

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Catalytic converters made with precious metals palladium, platinum and rhodium are especially targeted, according to the Justice Department.

From Los Angeles Times ● Sep. 5, 2026

The scientists first compared several metal nanocatalysts, including silver, cobalt, palladium, and platinum.

From Science Daily ● Aug. 10, 2026

Depending on the light, the silvery palladium leaf surface of Holzer’s wall piece skews slightly red or blue.

From The Wall Street Journal ● Jun. 16, 2026

Platinum and palladium, less-traded precious metals, have lost 17% and 15% this month, respectively.

From The Wall Street Journal ● Mar. 19, 2026

Its presence at Shiloh, and its prominence in the life of Joshua, support the view that it was the palladium of the Joseph tribes, but the traditions in question conflict with others.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" by Various

The Bilt Palladium, $495 annual fee: I was already considering the Bilt card before talking to Kelly because it appears to fit how I currently spend.

From MarketWatch ● Sep. 29, 2026

The Sex Pistols headlining the Palladium in New York City or the Agora in Cleveland wouldn’t have made splashy headlines.

From Salon ● Aug. 10, 2026

Jack White invited Twin Temple to open his Hollywood Palladium show after Charley Crockett dropped the satanic doo-wop duo over their ‘unholy’ imagery.

From Los Angeles Times ● Jul. 16, 2026

“Twin Temple, Would you like to open my show in L.A. on September 29th at the Hollywood Palladium? Let me know,” White posted on Friday, adding, “Get in front of me Satan!”

From Los Angeles Times ● Jul. 15, 2026

At last the Greeks learned that there was a most sacred image of Pallas Athena in the city, called the Palladium, and that as long as the Trojans had it Troy could not be taken.

From "Mythology: Timeless Tales of Gods and Heroes" by Edith Hamilton

The most appealing part of the package is a new documentary, R.E.M. by MTV, culled from the material and directed by Alex Young, which will also air on Palladia and VH1 Classic.

From BusinessWeek ● Nov. 26, 2014

TV rights to air "This Is It" on its MTV and BET family of networks -- including VH1 and Palladia, as well as MTV and BET -- for six years.

From Reuters ● Jun. 21, 2010

Palladia was a master at building churches, convents and palaces.

From Time Magazine Archive

It contained a Rajputana parrakeet, not much larger than a robin, but possessor of a soul as fierce as that of Palladia, minus, however, the smoothing influence of chivalry.

From Parrot & Co. by Harold MacGrath

There also exists a set of small Mycenaean relics called Palladia, found at Mycenae, Spata and in the earliest strata of the Acropolis at Athens.

From Homer and His Age by Andrew Lang

Vocabulary.com logo
by dictionary.com

Join 14,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training