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Pronounced "mall-ib(like rib)-den-umm"

Used in steel production since it likes to form carbide when it gets all melty with iron and carbon.

It's one of those elements that you don't really hear about unless you have a specific type of job or hobby set.

I know of it because I make knives and swords, and it's in some steel alloys I use. Some might know of it because it's used in high pressure hydraulic tubes.

But unless you deal with metallurgy, you have no real reason to know much about it.