Definition of "birchbark" [birch•bark]

• The bark of the birch tree, especially the white bark of the paper birch, Betula papyrifera. (noun)
• A piece of this bark, formerly used for writing on. (noun)

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• "How to carry fire in a piece of smouldering fungus wrapped in birchbark."
• "With its full stealth, supersonic cruise capability, and electronics that make the Starship Enterprise look like a birchbark canoe, it is utterly unmatched as a fighter aircraft."
• "We are literally still in the birchbark canoe stage of space exploration, testing the waters."