| Noun | 1. | Corylaceae - used in some classification systems for the genus Corylus hamamelid dicot family - family of mostly woody dicotyledonous flowering plants with flowers often unisexual and often borne in catkins Betulaceae, birch family, family Betulaceae - monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis) |