The wood of broad-leaved dicotyledonous trees (as distinguished from the wood of conifers); also items made from such wood; as, decorative hardwood. [WordNet 1.5]
hardwood, adj.
Made of the hard-to-cut wood of a broad-leaved tree, as e.g. oak; consisting of a hardwood; as, hardwood floors; -- of wood and wooden objects. [WordNet 1.5]