: 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
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This work, which first focused on critical minerals including indium, gallium, and tantalum, has been licensed to Metallium, a mineral exploration company in Western Australia.
—
IEEE Spectrum, 9 Oct. 2025
Their helmet visors use copper and indium tin oxide coatings for heat and glare control, while a head-up display provides real-time data inside the visor.
—Kaif Shaikh, Interesting Engineering, 8 Oct. 2025
One of the study’s clear limits is that the researchers based their calculations on high future growth rates for thin-film solar panels, which depend heavily on indium, cadmium, tellurium, and tin.
—Alexander C. Kaufman, The Atlantic, 11 Aug. 2025
Every phone screen has a super-thin layer of a material called indium tin oxide.
—Terence Musho, The Conversation, 28 May 2025
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IEEE Spectrum, 9 Oct. 2025
Their helmet visors use copper and indium tin oxide coatings for heat and glare control, while a head-up display provides real-time data inside the visor.
—Kaif Shaikh, Interesting Engineering, 8 Oct. 2025
One of the study’s clear limits is that the researchers based their calculations on high future growth rates for thin-film solar panels, which depend heavily on indium, cadmium, tellurium, and tin.
—Alexander C. Kaufman, The Atlantic, 11 Aug. 2025
Every phone screen has a super-thin layer of a material called indium tin oxide.
—Terence Musho, The Conversation, 28 May 2025
See All Example Sentences for indium
Cite this Entry
“Indium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indium. Accessed 22 Oct. 2025.
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indium
noun
in·di·um
ˈin-dē-əm 
: 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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