collapsium

English

Etymology

From collapse +‎ -ium. Probably alluding to black holes, which are extremely dense objects formed by collapsing matter in the core of a dying star.

Noun

collapsium (uncountable)

1. (science fiction) A fictional material usually described as having an extremely high density.

References

• Jesse Sheidlower, editor (2001–2025), “collapsium, n.”, in Historical Dictionary of Science Fiction.