A fictional metal that 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.
Made of adamantium.
'We knew the egg was adamantium. Not much else could have been learnt.'
From adamant + -ium.
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