Definition of "superheavy" [superheavy]

• Having far greater weight than usual. (adjective)
• Describing a transuranic element having an atomic number greater than 110 (adjective)
• Stressed more than is usual (adjective)
• Any superheavy element. (noun)

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• ""Proving the existence of atoms with such a high mass, the so-called superheavy elements, is a complex procedure because they exist for only tiny fractions of a second and then decay radioactively into other elements.""
• "The complex has proven reserves of over 2.1 billion barrels and probable reserves of 5 billion, though its crude is "superheavy", with a correspondingly low market price."
• "Physicists have reported synthesizing element 117, the latest achievement in their quest to create "superheavy" elements in the laboratory."