any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

a radioactive transuranic element

a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood

a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known

a rare polyvalent metallic element of the platinum group; it is found associated with platinum