• Webster's Revised Unabridged Dictionary
    • n Twinleaf (Bot) See Jeffersonia.
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Century Dictionary and Cyclopedia
    • n twinleaf An American herb, Jeffersonia diphylla: so named from the pair of leaflets into which the blade of the leaf is divided. See cut on following page.
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In literature:

Twinleaf belongs to the barberry family.
"Ginseng and Other Medicinal Plants" by A. R. (Arthur Robert) Harding