promethium
noun
\
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 Chemical Elements Table
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More Definitions for promethium
promethium
noun
\
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 Chemical Elements Table
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