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[gad-l-in-ee-uh m] /ˌgæd lˈɪn i əm/
noun, Chemistry.
a rare-earth metallic element. Symbol: Gd; atomic weight: 157.25; atomic number: 64.
Origin of gadolinium
First recorded in 1885-90; See origin at gadolinite, -ium
Related forms
gadolinic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for gadolinium
Historical Examples
  • However, they had enough old Federation-period textbooks still in microprint to know what could be done with gadolinium.

    Space Viking Henry Beam Piper
  • gadolinium was essential to hyperdrive engines; the engines of a ship the size of the Nemesis required fifty pounds of it.

    Space Viking Henry Beam Piper
  • Her captain wanted fissionables and gadolinium; Count Lionel was building more ships.

    Space Viking Henry Beam Piper
British Dictionary definitions for gadolinium


a ductile malleable silvery-white ferromagnetic element of the lanthanide series of metals: occurs principally in monazite and bastnaesite. Symbol: Gd; atomic no: 64; atomic wt: 157.25; valency: 3; relative density: 7.901; melting pt: 1313±°C; boiling pt: 3273°C (approx.)
Derived Forms
gadolinic, adjective
Word Origin
C19: New Latin, from gadolinite
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
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Word Origin and History for gadolinium

metallic element, named 1886 by J.C. Marginac in honor of Johan Gadolin (1760–1852), Finnish minerologist and chemist, who in 1794 first began investigation of the earth which eventually yielded the element and several others.

Online Etymology Dictionary, © 2010 Douglas Harper
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gadolinium in Medicine

gadolinium gad·o·lin·i·um (gād'l-ĭn'ē-əm)
Symbol Gd
A malleable, ductile metallic rare-earth element. Atomic number 64; atomic weight 157.25; melting point 1,314°C; boiling point 3,264°C; specific gravity 7.8; valence 3.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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gadolinium in Science
Symbol Gd
A silvery-white, malleable, ductile metallic element of the lanthanide series that has seven natural isotopes and 11 artificial isotopes. Two of the natural isotopes, Gd 155 and Gd 157, are the best known neutron absorbers. Gadolinium is used to improve the heat and corrosion resistance of iron, chromium, and various alloys and in medicine as a contrast medium for magnetic resonance imaging and as a radioisotope in bone mineral analysis. Atomic number 64; atomic weight 157.25; melting point 1,312°C; boiling point approximately 3,000°C; specific gravity from 7.8 to 7.896; valence 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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