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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.)

  1. The prickly ash.

  2. A shrub of the genus Aralia ( Aralia spinosa).