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)
- (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.