n. (Med.) Pain in a tooth or in the teeth; odontalgia. [ 1913 Webster ]
Toothache grass (Bot.), a kind of grass (Ctenium Americanum) having a very pungent taste. -- Toothache tree. (Bot.) (a)The prickly ash.(b)A shrub of the genus Aralia (Aralia spinosa). [ 1913 Webster ]