Adamantium

//ˌæ.dəˈmæn.tɪ.əm// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A fictional metal which is indestructible or nearly so. also, attributive, uncountable

    "It was a bullet. It was a small slug of adamantium, the toughest and hardest of all metals, crammed to capacity with the terrific explosive feroxite and would burst instantly on any reasonable heavy impact."

Synonyms

All synonyms
adamantineadamantite

Example

More examples

"Can Superman's x-ray vision see through adamantium?"

Etymology

From adamant + -ium (suffix forming humorous- or scientific-sounding fictional substance names).

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