superheavy

(noun, adjective)

adjective

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

1. (physics) Any superheavy element.