The Collaborative International Dictionary
Ctenium Americanum
Toothache \Tooth"ache`\, n. (Med.) Pain in a tooth or in the teeth; odontalgia. Toothache grass (Bot.), a kind of grass ( Ctenium Americanum) having a very pungent taste. Toothache tree. (Bot.)
The prickly ash.
A shrub of the genus Aralia ( Aralia spinosa).