First Known Use: 1948
Dictionary
promethium
noun pro·me·thi·um \-thē-əm\
Definition of PROMETHIUM
: a radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium — see element table
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Origin of PROMETHIUM
New Latin, from Latin Prometheus
Medical Dictionary
promethium
noun pro·me·thi·um \prə-ˈmē-thē-əm\
Medical Definition of PROMETHIUM
: a radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium—symbol Pm; see element table
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