The age characterised by the use of metal tools. / The Copper Age.

(mathematics, obsolete) An old kind of calculus in which lines were considered as made up of an infinite number of points; surfaces, as made up of an infinite number of lines; and volumes, as made up of an infinite number of surfaces.

A tough kind of sheet brass from which cartridge shells are made.

Designating direct contact between two metal items or elements.

A subgenre of black metal that focuses on slow, repetitive instrumentation and depressive or suicidal lyrics and imagery.

US spelling of newton metre

A music genre that fuses vocal and instrumental elements of hip-hop with heavy metal.

shape memory alloy

(inorganic chemistry) A coordination compound consisting of a metal cation surrounded by a fixed number of water ligands

(chemistry, obsolete) Any metal, such as gold or silver, not readily oxidized by heat and air.