A rare metallic chemical element of high economic value, such as gold and platinum.

A brass alloy consisting of copper (55%), zinc (41-43%) and iron (1-3%), with the balance consisting of various other metals. The proportions used make the material harder and suitable for valves and bearings.

A heavy and intense form of heavy metal music with a focus on speed, technical precision, alternate picking, extended guitar solos, and often having aggressive lyrics.

(physics) Any substance that acts as a conductor to electrons of one spin orientation, but as an insulator to those of the opposite orientation

(inorganic chemistry, alchemy) A metal resistant to corrosion, oxidizing and tarnishing, such as gold, platinum, copper and mercury.

Printing type cast from molten metal; hot metal typesetting.

(chemistry) A transition element

(dated) An alloy that has expanded upon cooling. / Sheet metal that has been slit and stretched at right angles to the slits to form a lattice; used for making screens etc and for reinforcing concrete.

(chemistry) Any metal at the lower end of the electrochemical series that oxidizes readily. / (metallurgy) The metal to be welded (rather than that used to weld). / A common or inexpensive metal.

(music) A subgenre of heavy metal music from the 1990s and 2000s with some sounds and influences from grunge and hip-hop.