How many syllables in iron?

Definition of iron:

iron (noun):

a small electrically heated device with a weighted flat bottom for pressing clothes

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 silver-white malleable ductile magnetic heavy metallic element that readily rusts in moist air, occurs in pure form in meteorites and combined in most igneous rocks, is the most abundant element on earth by mass, and is vital to biological processes see chemical elements table