transuranic

Meanings

1. 1
   adj

   of a chemical element, having an atomic number greater than uranium's atomic number of 92

   Plutonium was the first transuranic element to be produced in useful quantities.

2. 2
   noun

   a chemical element with an atomic number greater than 92

   Most transuranics are synthetic and decay radioactively.

Formed from trans- ("beyond") + uranic, from uranium. The term literally denotes elements lying beyond uranium in the periodic table, all of which are radioactive.

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