hornbeam

n. [ See Beam. ] (Bot.) A tree of the genus Carpinus (Carpinus Americana), having a smooth gray bark and a ridged trunk, the wood being white and very hard. It is common along the banks of streams in the United States, and is also called ironwood. The English hornbeam is Carpinus Betulus. The American is called also blue beech and water beech. [ 1913 Webster ]

Hop hornbeam. (Bot.) See under Hop. [ 1913 Webster ]