- iron, Fe, atomic number 26 - 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
--1 is a kind of metallic element, metal
--1 is a substance of steel; iron ore
--1 has particulars:alpha iron; beta iron; gamma iron; delta iron; ingot iron; cast iron; wrought iron; galvanized iron; pig iron; scrap iron; structural iron