protoactinium


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protoactinium

(ˌprəʊtəʊækˈtɪnɪəm)
n
(Elements & Compounds) the former name of protactinium
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.protoactinium - a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into leadprotoactinium - a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
References in periodicals archive ?
In a unique instance of double embedment, there is acTINium and protoACTINIUM.