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gallium

American  
[gal-ee-uhm] / ˈgæl i əm /

noun

Chemistry.
  1. a rare, steel-gray, trivalent metallic element used in high-temperature thermometers because of its high boiling point (1983°C) and low melting point (30°C). Ga; 69.72; 31; 5.91 at 20°C.


gallium British  
/ ˈɡælɪəm /

noun

  1. a silvery metallic element that is liquid for a wide temperature range. It occurs in trace amounts in some ores and is used in high-temperature thermometers and low-melting alloys. Gallium arsenide is a semiconductor. Symbol: Ga; atomic no: 31; atomic wt: 69.723; valency: 2 or 3; relative density: 5.904; melting pt: 29.77°C; boiling pt: 2205°C

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

gallium Scientific  
/ gălē-əm /
  1. A rare, silvery metallic element that is found as a trace element in coal, in bauxite, and in several minerals. It is liquid near room temperature and expands when it solidifies. It is used in thermometers and semiconductors. Atomic number 31; atomic weight 69.72; melting point 29.78°C; boiling point 2,403°C; specific gravity 5.907; valence 2, 3.

  2. See Periodic Table


Etymology

Origin of gallium

1870–75; < New Latin, equivalent to Latin gall ( us ) cock (translation of French coq, from Lecoq de Boisbaudran, 19th-century French chemist) + New Latin -ium -ium

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It said its concentrate included other lesser-known critical minerals such as germanium and gallium.

From The Wall Street Journal

And substantially all of the gallium supplied worldwide comes from China.

From The Wall Street Journal

The deal would see supplies of zinc concentrate, including germanium and gallium, sent to U.S. markets.

From The Wall Street Journal

A new processing plant for gallium, a key semiconductor material dominated by China, is expected to start up in Australia at the end of 2026, with backing from the Japanese, American and Australian governments.

From The Wall Street Journal

The module can be adapted for future semiconductor materials, including gallium nitride and gallium oxide, which has not yet reached commercial use.

From Science Daily