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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Origin and Etymology of promethium
New Latin, from Latin Prometheus
Medical Dictionary
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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Britannica.com: Encyclopedia article about promethium
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