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Wiktionary

superheavy

English

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Some calcium-48. This isotope, the heaviest stable isotope of calcium, is highly desired for the manufacture of superheavy elements. All superheavy elements are artificial; none occur naturally on Earth.

Etymology

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From super- +‎ heavy.

Pronunciation

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  • Audio (US):(file)

Adjective

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superheavy (not comparable)

  1. Much heavier than usual.
    The superheavy tank weighed 80 tonnes and was said to be indestructible in combat.
  2. (nuclear physics) Describing a transuranic element with an extremely high atomic number; typically taken to mean beyond lawrencium (element 103, the last actinide)
  3. (linguistics, of a syllable) stressed more than is usual

Derived terms

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Noun

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superheavy (plural superheavies)

  1. (nuclear physics) A superheavy element.

Usage notes

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It has been suggested that elements beyond #126 (unbihexium, Ubh) be called "beyond superheavy".[1]

References

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  1. ^ Synthesis and Properties of Isotopes of the Transactinides, article by Hofmann, Sigurd, 2019. Journal: Radiochimica Acta.
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