1) Artificial vanilla source 
• 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.
Ton'ka bean` [ Confer French onca , tonka .] (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 tonquin bean . [ Written also tonca bean , tonga bean .] 
The tonka bean is the fruit of a Guiana shrub. It is used in perfumery.
[n] - fragrant black nutlike seeds of the tonka bean tree 2. [n] - tall tropical South American tree having pulpy egg-shaped pods of fragrant black almond-shaped seeds used for flavoring
Coumarouna odorata noun tall tropical South American tree having pulpy egg-shaped pods of fragrant black almond-shaped seeds used for flavoring