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 Chemical Elements Table

First Known Use of protactinium

1918, in the meaning defined above

History and Etymology for protactinium

New Latin

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prosyllogism

Prot

protactinium

protagon

protagonism

protagonist

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The first known use of protactinium was in 1918

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More Definitions for protactinium

protactinium

noun
prot·ac·tin·i·um | \ˌprōt-ˌak-ˈtin-ē-əm \
variants: also protoactinium \ˌprōt-ō- \

Medical Definition of protactinium 

: a shiny metallic radioelement of relatively short life symbol Pa — see Chemical Elements Table

More from Merriam-Webster on protactinium

Britannica.com: Encyclopedia article about protactinium

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