noun
: a birch ( Betula fontinalis ) of western No. America resembling the paper birch of the northeastern United States but with brownish bark — called also mountain birch, swamp birch, western birch
noun
: a birch ( Betula fontinalis ) of western No. America resembling the paper birch of the northeastern United States but with brownish bark — called also mountain birch, swamp birch, western birch
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012