iron tree
/ˈaɪərn ˌtri/
noun
- A tree with very hard, heavy wood, such as the hornbeam or certain tropical trees.
- The carpenter chose iron-tree wood for the tool handles because it would not break easily.
- They used planks from an iron-tree to build a bridge that lasted for decades.
- In the forest, the iron-tree stood out with its dense, dark bark and rock-hard trunk.