Noun tonka bean has 2 senses
  1. tonka bean, coumara nut - fragrant black nutlike seeds of the tonka bean tree; used in perfumes and medicines and as a substitute for vanilla
    --1 is a kind of bean
  2. tonka bean, tonka bean tree, Coumarouna odorata, Dipteryx odorata - tall tropical South American tree having pulpy egg-shaped pods of fragrant black almond-shaped seeds used for flavoring
    --2 is a kind of bean tree
    --2 is a member of Coumarouna, genus Coumarouna, Dipteryx, genus Dipteryx
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