in·​di·​um ˈin-dē-əm How to pronounce indium (audio)
: a silvery malleable fusible chiefly trivalent metallic element that occurs especially in sphalerite ores and is used especially as a plating material, in alloys, and in electronics see Chemical Elements Table

Example Sentences

Recent Examples on the Web The team’s design works by exploiting the interactions between ultra-thin materials using a conductive material known as indium tin oxide. Joshua Hawkins, BGR, 1 Nov. 2022 The studies will focus on more than a dozen critical minerals, including tin and indium geologists say is found across Alaska. Alex Demarban, Anchorage Daily News, 5 Sep. 2022 Others, like the percentage of indium that ends up in electronics, are necessarily rougher estimates, and the researchers caution against treating any number here as a definitive estimate. John Timmer, Ars Technica, 20 May 2022 The materials the company is using are relatively unusual: aluminum as the superconducting wire and indium arsenide as the semiconductor that surrounds it. John Timmer, Ars Technica, 15 Mar. 2022 An Australian scientist may have developed a solution that would help the world wean itself off of indium. Frank Holmes, Forbes, 30 Aug. 2021 Most of the worries about solar panel production have focused on the elements that go into the panels themselves, like gallium, cadmium, germanium, indium, selenium, and tellurium. Doug Johnson, Ars Technica, 25 Jan. 2022 Although indium is not technically a rare earth element, its economics are very much the same. Frank Holmes, Forbes, 30 Aug. 2021 The low-temperature polycrystalline oxide will also use IGZO (indium gallium zinc oxide) technology for improved efficiency and responsiveness. Chris Smith, BGR, 14 July 2021 See More

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

Word History


International Scientific Vocabulary ind- + New Latin -ium

First Known Use

1864, in the meaning defined above

Time Traveler
The first known use of indium was in 1864

Dictionary Entries Near indium

Cite this Entry

“Indium.” Dictionary, Merriam-Webster, Accessed 26 Nov. 2022.

Kids Definition



in·​di·​um ˈin-dē-əm How to pronounce indium (audio)
: a soft silvery metallic element see element

Medical Definition



in·​di·​um ˈin-dē-əm How to pronounce indium (audio)
: a malleable fusible silvery metallic element that is chiefly trivalent, occurs especially in sphalerite ores, and is used as a plating for bearings, in alloys having a low melting point, and in making transistors
symbol In
see Chemical Elements Table

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