Collapsium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A fictional material usually described as having an extremely high density. uncountable

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.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.