tonka-bean /tongˈkə-bēnˈ/

1. (also tonga-bean /tongˈgə-/, tonquin-bean /tongˈkēn-/) the coumarin-scented seed of a large papilionaceous tree (genus Dipteryx) of Guiana, used for flavouring snuff, etc
2. The tree from which it comes

• impastes
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