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5 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 neo·dym·i·um /ˌnioˈdɪmiəm/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 neo·dym·i·um /ˌnɪoˈdɪmɪəm/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Ne·o·dym·i·um n.  Chem. The chemical element of atomic number 60, one of the rare earth elements.  Symbol Nd.  Atomic weight 144.27.
 Note: It is a rare metallic element occurring in combination with cerium, lanthanum, and other rare metals, and forming amethyst-colored salts.  It was originally thought to be part of a supposed new element didymium, obtained from cerite in 1843.  Later this was resolved into two elements, neodymium and praesodymium by von Welsbach in 1885.  It is chiefly trivalent.  It is a faintly yellow metal.

From: WordNet (r) 2.0

      n : a yellow trivalent metallic element of the rare earth group;
          occurs in monazite and bastnasite in association with
          cerium and lanthanum and praseodymium [syn: Nd, atomic
          number 60]

From: Elements database 20001107

 Symbol: Nd
 Atomic number: 60
 Atomic weight: 144.24
 Soft bright silvery metallic element, belongs to the lanthanoids. Seven natural
 isotopes, Nd-144 being the only radioactive one with a half-life of 10^10
 to 10^15 years. Six artificial radioisotopes have been produced. The
 metal is used in glass works to color class a shade of violet-purple and
 make it dichroic. One of the more reactive rare-earth metals, quickly reacts
 with air. Used in some rare-earth alloys. Neodymium is used to color
 the glass used in welder's glasses. Neodymium is also used in very
 powerful, permanent magnets (Nd2Fe14B). Discovered by Carl F. Auer von
 Welsbach in Austria in 1885 by separating didymium into its elemental
 components praseodymium and neodymium. The name comes from the Greek words
 "neos didymos" which means "new twin". Neodymium should be considered
 highly toxic, however evidence would seem to show that it acts as little
 more than a skin and eye irritant. The dust however, presents a fire and
 explosion hazard.