(physics) A minor stable isotope of iron, ⁵⁸₂₆Fe, having 26 protons and 32 neutrons; it amounts to about 0.3% of the element in nature

(physics) A minor stable isotope of iron, ⁵⁴₂₆Fe, having 26 protons and 28 neutrons; it amounts to about 6% of the element in nature

(physics) The major stable isotope of iron, ⁵⁶₂₆Fe, having 26 protons and 30 neutrons; it amounts to about 92% of the element in nature

(rare) the beak (tapered end) of an anvil

(figuratively) Firmness, inflexibility, sternness.

Alternative form of ironshot

plural of grozing iron

plural of wrought iron

(geology) Any of a class of meteorite that is composed mostly of iron and nickel alloys

(inorganic chemistry) Group 8 of the periodic table, comprising iron, ruthenium, osmium and hassium