Meanings
- alsoattributiveuncountablefictionA fictional metal which is indestructible or nearly so.
We knew the egg was adamantium. Not much else could have been learnt.
2004, Neal Asher, Gridlinked, Macmillan, →ISBN, page 3242 more examples
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.
1941 June, Malcolm Jameson, “Devil's Powder”, in Astounding Science-Fiction, volume 27, number 4, Street & SmithIt's imperative that these experiments be concluded with haste! The military must know the potential of this new adamantium at once! Even the President is standing by!
1969 July, Roy Thomas, “Betrayal”, in Avengers, volume 1, number 66, Marvel ComicsSynonyms: adamantine, adamantite
Synonyms & antonyms
nounA fictional metal which is indestructible or nearly so.
Origin
From adamant + -ium (suffix forming humorous- or scientific-sounding fictional substance names).
Full word history & related roots →Translations
Japanese アダマンティウム
- アダマンティウム (adamantiumu)fictional metal which is indestructible or nearly so
Korean 아다만티움
- 아다만티움 (adamantium)fictional metal which is indestructible or nearly so
Portuguese adamantium
- adamantiumfictional metal which is indestructible or nearly so
Russian адама́нтий
- адама́нтий (adamántij)fictional metal which is indestructible or nearly so
Cite this entry
adamantium. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/adamantium
“adamantium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/adamantium. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “adamantium,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/adamantium.
Source: adamantium on Wiktionary, CC BY-SA 4.0.