Definitions

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

Etymologies

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").

Examples

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  • Dy.

    December 16, 2007