(physics) A minor stable isotope of iron, ⁵⁷₂₆Fe, having 26 protons and 31 neutrons; it amounts to about 2% of the element in nature

A barrier made of iron in the theatre, lowered between the stage and the auditorium for safety or to prevent communication. / (idiomatic) Any impenetrable barrier.

plural of curling iron

plural of iron oxide

(slang) A simple harmonica

(mining) A mineral deposit from which iron can be viably extracted.

(idiomatic, dated) bad luck.

(gymnastics) A position on the rings where the gymnast holds the rings straight out on either side of the body.

Any of a set of metal tools kept beside the fireplace, used to keep the fire burning as required. The set usually consists of fire tongs, a poker, a spade, and a brush for the ashes.

plural of fire iron