superheavy

Meanings

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

1. A superheavy thing.
2. A superheavy element.
3. A superheavy tank or artillery piece.

Etymology

From super- + heavy.