(chemistry) An element, such as silicon or germanium, intermediate in properties between that of a metal and a nonmetal; especially one that exhibits the external characteristics of a metal, but behaves chemically more as a nonmetal.

(not comparable) Of or relating to the metalloids. / (informal) Characteristic of the metal music genre.

(metallurgy) Of or relating to metallurgy, the study of metals and their properties.

(dated) A person who works in metal (the type of material). / A person skilled in metallurgy.

(organic chemistry) A heterocycle containing at least one metal atom in the ring

The metallurgy of producing metal components by compacting and sintering powdered metals

The type of coal used for the making of steel.