Made of birch wood, or relating to or resembling birch trees.
From 'birch' (from Old English 'birce') plus the adjectival suffix '-en', following the pattern of 'golden,' 'wooden,' and 'wooden' to indicate material composition.
Birch wood appears white because of a special bark compound called betulin, which makes birch trees glow like silver in dark forests—Vikings and Native Americans used birch bark for everything from canoes to art.
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