| tonka bean | <botany> 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 tiononquin bean. Alternative forms: tonca bean, tonga bean. Origin: Cf. F. Onca, tonka. Source: Websters Dictionary (01 Mar 1998) |
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