prickly-ash

noun

• a spiny North American shrub or tree with prickly branches and bark that can be used medicinally.

  • Genus Zanthoxylum, family Rutaceae: the northern prickly-ash (Z. americanum) (also called toothache tree), and the southern prickly-ash (see Hercules-club)
• a medicinal preparation of the bark of the prickly-ash.