Horn"beam` (?), n. [See Beam.]
(Bot.) A tree of the genus Carpinus (C.
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 C. Betulus. The American is called also
blue beech and water beech.
Hop hornbeam. (Bot.) See under