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ruthenium
noun
ru·the·ni·um
rü-ˈthē-nē-əm
: a rare hard silvery-white metallic element occurring in platinum ores and used especially as a catalyst and to harden alloys see Chemical Elements Table
Examples of ruthenium in a Sentence
Recent Examples on the Web
The moon affects the tides, and that is the narrative depicted on this dial, with mother-of-pearl and ruthenium on the dial, illuminated by diamond highlights–2.62 carats in all.
—
Carol Besler, Robb Report, 23 Oct. 2024
The movement features a sunray brushed finish in black ruthenium, lending a modern and dynamic appearance to the design.
—
Matthew Catellier, Forbes, 30 Nov. 2024
Trying on a one-off watch from the brand with case and bracelet crafted entirely from ruthenium (a member of the platinum family used by high-end watchmakers) left little doubt about the quality on offer.
—
Allen Farmelo, Robb Report, 29 Oct. 2024
Their findings, however, strengthen the case thanks to a rare element called ruthenium.
—
Eric Lagatta, USA TODAY, 16 Aug. 2024
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Word History
Etymology
New Latin, from Medieval Latin Ruthenia Ruthenia
First Known Use
1829, in the meaning defined above
Dictionary Entries Near ruthenium
Cite this Entry
“Ruthenium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ruthenium. Accessed 12 Feb. 2025.
Kids Definition
ruthenium
noun
ru·the·ni·um
rü-ˈthē-nē-əm
: a hard brittle grayish rare metallic element used especially in alloys and catalysts see element
Medical Definition
ruthenium
noun
ru·the·ni·um
rü-ˈthē-nē-əm
: a hard brittle grayish polyvalent rare metallic element occurring in platinum ores and used in hardening platinum alloys
—symbol Ru
see Chemical Elements Table
More from Merriam-Webster on ruthenium
Britannica.com: Encyclopedia article about ruthenium
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