Curium

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The American Heritage® Dictionary of the English Language, 4th Edition
  • n. A silvery metallic synthetic radioactive transuranic element. Its longest lived isotope is Cm 247 with a half-life of 16.4 million years. Atomic number 96; melting point (estimated) 1,350°C; valence 3. See Table at element.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A transuranic chemical element (symbol Cm) with an atomic number of 96.
  • the GNU version of the Collaborative International Dictionary of English
  • n. a radioactive transuranic element of atomic number 96, having an atomic weight of 247 for its most stable isotope (half-life 1.6 x 107 years). The chemical symbol is Cm.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • n. a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei
  • Hypernym
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    Synonym
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    cm    atomic number 96