Any of a number of tree species known for having a particularly solid wood.
User Defined Definitions
"handsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfume; source of very heavy hardwood used for railroad ties"
"exceptionally tough or hard wood of any of a number of ironwood trees"
"a small slow-growing deciduous tree of northern Iran having a low domed shape"
"medium-sized hop hornbeam of eastern North America"