Millerite

n.	1.	A believer in the doctrine of William Miller (d. 1849), who taught that the end of the world and the second coming of Christ were at hand.
	1.	(Min.) A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; - sometimes called hair pyrites.

Noun

1.

millerite - a yellow mineral consisting of nickel sulfide; a minor source of nickel

atomic number 28, mineral, Ni, nickel