(sciences, countable) Any metal that has a specific gravity greater than about 5, especially one, such as lead, that is poisonous and may be a hazard in the environment.

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

(chemistry) a chemical bond in which mobile electrons are shared over many nuclei; this leads to electrical conduction

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 form of brass, being an alloy of about 80% copper and 20% zinc, produced in thin sheets and used to make cheap jewelry

An alloy with high magnetic permeability, consisting of nickel (77%) and iron (15%) with traces of copper and molybdenum.

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.

(chemistry) any compound in which hydrogen is bonded chemically to a metal or metalloid element

(chemistry) Any complex of a transition metal combined with carbon monoxide; they are typically volatile solids or liquids, soluble on common organic solvents but insoluble in water; they are highly toxic.

Alternative letter-case form of babbitt metal