\Cas`ca*ril"la\, n.[Sp., small thin bark, Peruvian
bark, dim. of c['a]scara bark.] (Bot.)
A euphorbiaceous West Indian shrub ({Croton Eleutheria});
also, its aromatic bark.
{Cascarilla bark} (or {Cascarilla}) (Med.), the bark of
   {Croton Eleutheria}. It has an aromatic odor and a warm,
   spicy, bitter taste, and when burnt emits a musky odor. It
   is used as a gentle tonic, and sometimes, for the sake of
   its fragrance, mixed with smoking tobacco, when it is said
   to occasion vertigo and intoxication.