protactinium

noun prot·ac·tin·i·um \ˌprō-ˌtak-ˈti-nē-əm\

Definition of PROTACTINIUM

: a shiny radioactive metallic element of relatively short life — see element table

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New Latin

First Known Use: 1918

Medical Dictionary

noun prot·ac·tin·i·um \ˌprōt-ˌak-ˈtin-ē-əm\

: a shiny metallic radioelement of relatively short life—symbol Pa; see element table

prot·ac·tin·i·um also pro·to·ac·tin·i·um \ˌprōt-ō-\

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