See Also: protactinium(medicine)
protactinium(dictionary)
impurist (iou) and protactinium (medicine)
impurist (iou)
impurist noun. M20.
[from IMPURE adjective after purist.]
A person who is not a purist; an opponent of purism.
protactinium (medicine)
protactinium
<chemical> Protactinium. A radioactive element of the actinide group of metals. It has the atomic symbol pa, atomic number 91, and atomic weight 231. It decays by alpha-emission.
Chemical name: Protactinium
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