Source : WordNet®

ironwood tree
     n 1: 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 [syn: {rose chestnut}, {ironwood}, {Mesua ferrea}]
     2: a small slow-growing deciduous tree of northern Iran having
        a low domed shape [syn: {iron tree}, {iron-tree}, {ironwood}]
     3: medium-sized hop hornbeam of eastern North America [syn: {Eastern
        hop hornbeam}, {ironwood}, {Ostrya virginiana}]