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An aromatic, spiny North American shrub or tree (Zanthoxylum americanum) whose dried bark has medicinal uses.
(Plants) another name for prickly ash
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|Noun||1.||toothache tree - small deciduous aromatic shrub (or tree) having spiny branches and yellowish flowers; eastern North America|
prickly ash - any of a number of trees or shrubs of the genus Zanthoxylum having spiny branches