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Entry 1 sense Webster, 1913

Tonka bean

/täng'-kə bēn/ · Ton·ka bean · IPA
01 The seed of a leguminous tree (Dipteryx odorata), native of Guiana. It has a peculiarly agreeable smell, and is employed in the scenting of…
  1. 1.
    The seed of a leguminous tree (Dipteryx odorata), native of Guiana. It has a peculiarly agreeable smell, and is employed in the scenting of snuff. Called also tonquin bean.(Bot.) Also: tonquin bean