adamantium

/ˌæ.dəˈmæn.tɪ.əm/

adamantium means A fictional metal which is indestructible or nearly so. Lexicurio rates it Sui generis — a strength score of 89 out of 100.

adamantium is pronounced /ˌæ.dəˈmæn.tɪ.əm/.

Etymology

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

noun

A fictional metal which is indestructible or nearly so.“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.”