from
The Collaborative International Dictionary of English v.0.48
Ironwood \I"ron*wood`\, n. (Bot.)
A tree unusually hard, strong, or heavy wood.
[1913 Webster]
Note: In the United States, the hornbeam and the hop hornbeam
are so called; also the {Olneya Tesota}, a small tree
of Arizona; in the West Indies, the {Erythroxylon
areolatum}, and several other unrelated trees; in
China, the {Metrosideros vera}; in India, the {Mesua
ferrea}, and two species of {Inga}; in Australia, the
{Eucalyptus Sideroxylon}, and in many countries,
species of {Sideroxylon} and {Diospyros}, and many
other trees.
[1913 Webster]