superheavy

From super- +‎ heavy.

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superheavy (not comparable)

1. Much heavier than usual.

   Alternative form: super-heavy

   Near-synonym: superheavyweight

   The superheavy tank weighed 80 tonnes and was said to be indestructible in combat.

   1. (nuclear physics) Describing a transuranic element with an extremely high atomic number; typically taken to mean beyond lawrencium (element 103, the last actinide).
2. (linguistics, of a syllable) stressed more than is usual

superheavy (plural superheavies)

1. A superheavy thing.

   Alternative form: super-heavy

   Near-synonym: superheavyweight

   1. (nuclear physics) A superheavy element.
   2. (military, informal) A superheavy tank or artillery piece.
      • 1961, U.S. Army, “Communist Military Capabilities”, in Army Information, Pamphlet No. 355-201-1‎^[1], page 89:

        Representative of the scope of Soviet artillery development, two types of super-heavy, self-propelled artillery pieces (a 400mm mortar and a 310mm gun) trundled across Red Square during the parade of November 1960. There is no doubt that these weapons fire an unorthodox long-range shell, or that such a shell could carry a nuclear warhead. However, with the advent of rockets and missiles on mobile launchers, and since only two of each type of these super-heavies was seen on parade, it may well be that they will never be produced and issued to troops in large numbers. Whatever their intended role, these guns clearly demonstrate the broad scope of Soviet effort in the field of weapons development.

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