English

Adjective

superheavy ‎(comparative more superheavy, superlative most superheavy)

1. Having far greater weight than usual.

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

2. (physics) Describing a transuranic element having an atomic number greater than 110
3. (linguistics, of a syllable) stressed more than is usual

Noun

superheavy ‎(plural superheavies)

1. (physics) Any superheavy element.