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

Examples of indium in a Sentence

Recent Examples on the Web Mongolia is an acute illustration of the geopolitical, environmental, and economic challenges facing mineral-rich nations seeking to benefit from emerging technologies, whether supplying indium for flat-screen TVs, rhenium for jet engines, or gallium for smartphones. TIME, 14 May 2024 Zinc, silver, lead, tin, and indium high grade outliers were constrained during interpolation on a per domain basis. Fort Worth Star-Telegram, 28 Feb. 2024 Inferred Zinc Zone Mineral Resource of 31.2 Mt grading 4.21% zinc, 14.5 g/t silver, 0.2% lead & 45 g/t indium containing: 2.90 billion pounds of zinc; 14.6 million ounces of silver; 133 million pounds of lead; and 1,414 tonnes of indium. Fort Worth Star-Telegram, 28 Feb. 2024 This sidesteps the usual problems that stem from adding indium. IEEE Spectrum, 30 June 2023 Using indium gallium arsenide, engineers in South Korea recently made high-performance logic transistors on plastic that hardly suffered when bent around a radius of just 4 millimeters. Samuel K. Moore, IEEE Spectrum, 26 Nov. 2022 Adding indium shifts the wavelength of light toward red but also lowers efficiency. IEEE Spectrum, 30 June 2023 In most devices, this layer is made from a compound known as indium tin oxide (ITO), which is rigid, expensive to manufacture, and requires the rare metal indium. Byluis Melecio-Zambrano,, 23 Feb. 2023 Institute of Photonics/LUH The first section of the chip features an optical amplifier built out of indium phosphide, a material that has already been widely used to create semiconductor lasers. IEEE Spectrum, 17 Apr. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'indium.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 20 Jun. 2024.

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

More from Merriam-Webster on indium

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!