rho·​di·​um | \ ˈrō-dē-əm How to pronounce rhodium (audio) \

Definition of rhodium

: a rare silvery-white hard ductile metallic element that is resistant to acids, sometimes occurs naturally in pure form but is usually obtained from nickel ores, and is used especially as a catalyst and in platinum alloys — see Chemical Elements Table

Examples of rhodium in a Sentence

Recent Examples on the Web Converters are a target of robberies as these contain valuable metals such as platinum, palladium and rhodium. Perry Vandell, The Arizona Republic, 26 May 2022 Most people are aware that platinum is nearly as expensive as gold at over $900 an ounce, but that figure pales in comparison to the price of palladium at over $2,000 an ounce and rhodium at an astronomical $16,000 an ounce. Bill Roberson, Forbes, 30 Apr. 2022 Increasing costs of stuff like aluminium and rhodium have led to more expensive semiconductors, catalytic converters, and other car parts. Niharika Sharma, Quartz, 13 Apr. 2022 When the two sweep hands are activated via the pusher at 2 o’clock, the red 10th of a second hand turns around the dial 10 times faster than the rhodium sandblasted steel seconds hand. Paige Reddinger, Robb Report, 6 Apr. 2022 Thieves target the emissions devices for the small amounts of precious metals inside, which typically include platinum, palladium and rhodium. Bill Roberson, Forbes, 30 Apr. 2022 This would still be zero for uranium, rhodium, palladium, silver bullion and king crabs. Arkansas Online, 12 Mar. 2022 This would still be zero for uranium, rhodium, palladium, silver bullion and king crabs. Josh Boak And Christopher Rugaber, Anchorage Daily News, 11 Mar. 2022 This would still be zero for uranium, rhodium, palladium, silver bullion and king crabs. Zeke Miller, Time, 11 Mar. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rhodium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of rhodium

1804, in the meaning defined above

History and Etymology for rhodium

Greek rhódon "rose" + -ium; from the rose color of a chlorine compound of the metal obtained during its isolation

Note: Name introduced by the discoverer of the metal, William Hyde wollaston, in "On a new Metal, found in crude Platina," "read June 24, 1804," Philosophical Transactions of the Royal Society of London for the Year 1804, Part II, p. 419: "My inquiries having terminated more successfully than I had expected, I design the present Memoir to prove the existence, and to examine the properties, of another metal, hitherto unknown, which may not improperly be distinguished by the name of Rhodium, from the rose-colour of a solution of the salts containing it."

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The first known use of rhodium was in 1804

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rhodium oil

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Last Updated

29 May 2022

Cite this Entry

“Rhodium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rhodium. Accessed 5 Jul. 2022.

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More Definitions for rhodium


rho·​di·​um | \ ˈrōd-ē-əm How to pronounce rhodium (audio) \

Medical Definition of rhodium

: a white hard ductile metallic element that is resistant to attack by acids, occurs in platinum ores, and is used in alloys with platinum symbol Rh — see Chemical Elements Table

More from Merriam-Webster on rhodium

Britannica.com: Encyclopedia article about rhodium


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