from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A soft, silvery metallic rare-earth element occurring in monazite and bastnaesite used in nuclear reactor control rods and in the manufacture of laser materials and compact discs. Atomic number 66; atomic weight 162.50; melting point 1,412°C; boiling point 2,567°C; specific gravity 8.551; valence 3. cross-reference: Periodic Table.

from The Century Dictionary.

  • noun In chem., one of the supposedly distinct elements of the yttrium group contained in samarskite and gadolinite, closely related to holmium, but distinguished from it by a special absorption-spectrum.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) An element of the rare earth-group. Symbol Dy; at. wt., 162.5.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A metallic chemical element (symbol Dy) with an atomic number of 66.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic


from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin, from Greek dusprositos, difficult to approach (from its rarity in nature) : dus-, dys- + prositos, approachable (from prosienai, to approach : pros-, toward + ienai, i-, to go; see ei- in Indo-European roots).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek δυσπρόσιτος (dusprositos, "hard to get").


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  • A material known as dysprosium, used in magnets for wind turbines and electric vehicles, is particularly important to the clean-technology sector.

    U.S.: Rare-Earth Supplies Face Possible Disruptions Tennille Tracy 2010

  • Dysprosium - one of the most critical rare-earth elements used in heat-resistant magnets for military radar systems In Latin, dysprosium means "hard to get" - has risen from $6.50 per pound in 2003 to more than $130 per pound today.

    The Full Feed from Rep. Hank Johnson 2011

  • Ucore mines for heavy' rare-earth minerals such as dysprosium, which is used to make wind turbines and electric vehicles. -- Top News 2011

  • Japan's high-powered magnet makers are grappling with tight supplies of dysprosium, which is commercially available at a reasonable cost only in China.

    Yahoo! News: Business - Opinion 2012

  • TOKYO Reuters - Japan aims to cut domestic consumption of a heavy rare earth used widely in hybrid cars and electronics by 30 percent over the next two years as China keeps a tight grip on exports of the material, known as dysprosium.

    Yahoo! News: Business - Opinion 2012

  • It said Boulder Wind Power's design allows for magnets that don't need the mineral dysprosium, which is scarce.

    unknown title 2011

  • Department of Energy study recently warned of short-term supply disruptions for elements such as dysprosium and neodymium needed to make wind turbines and electric cars.

    China's Rare-Earth Exports Slide, Still Bust Quota James T. Areddy 2011

  • China controls around 95% of the world's rare-earth output, a near-monopoly it has slowly built with the help of its export quotas to achieve higher prices for the ores, which include obscure elements such as dysprosium and neodymium.

    China May Widen Door to Rare-Earth Joint Ventures 2010

  • HREE, such as dysprosium and terbium, is estimated at 8% and 6% respectively.

    Latest News - Yahoo!7 News 2010

  • Southern Afghanistan, where Helmand is located, may also hold uranium and so-called heavy rare-earth elements such as dysprosium, he said, which is used in magnets. -- Top News 2010


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  • Dy.

    December 16, 2007