the plant family Betulaceae, characterized by deciduous trees having simple serrate leaves, male flowers in drooping catkins, female flowers in short clusters, and one-seeded nuts, and including the alder, birch, hazel, and hornbeam.
BIRCH FAMILY
Meaning of BIRCH FAMILY in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012