Element
americium Audio
am·er·i·ci·um [ am-uh-rish-ee-uhm ]
Subclass of:
Actinoid Series Elements; Metals, Heavy
Definitions related to americium:
  • A completely man-made radioactive actinide with atomic symbol Am, and atomic number 95. Its valence can range from +3 to +6. Because of its nonmagnetic ground state, it is an excellent superconductor. It is also used in bone mineral analysis and as a radiation source for radiotherapy.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • A man-made radioactive element with atomic symbol Am, atomic number 95, and atomic weight 243.
    NCI
    U.S. National Cancer Institute, 2021
  • Completely man-made radioactive actinide with atomic symbol Am; because of its nonmagnetic ground state, it is an excellent superconductor; it is also used in bone mineral analysis and as a radiation source for radiotherapy.
    CRISP Thesaurus
    National Institutes of Health, 2006
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