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. (a) The prickly ash. (b) A shrub of the genus Aralia (A. spinosa).
© Webster 1913.