Webster's Revised Unabridged Dictionary · 1913

(Botany) A prickly shrub (Xanthoxylum Americanum) with yellowish flowers appearing with the leaves; also called toothache tree. All parts of the plant are pungent and aromatic. The southern species is Xanthoxylum Carolinianum. — Gray

(Botany) Hercules'-club, also called the Angelica tree.