from the GNU version of the Collaborative International Dictionary of English
- n. a natural family of monoecious trees and shrubs, including the genera Betula; Alnus; Carpinus; Corylus; Ostrya; and Ostryopsis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)
Sorry, no etymologies found.