hardwood

trees belonging to the botanical group Angiospermae 2. the xylem of Angiospermae —note hardwood shows extreme variation in vertical and horizontal (radial) systems of elements but, with few exceptions, is composed of vessels and rays —note the wood of hardwoods may be either physically hard (high specific gravity) or soft (low specific gravity) —see softwood, lumber This definition last updated 10/27/2008