from
The Collaborative International Dictionary of English v.0.48
Cascarilla \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.
[1913 Webster]
{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.
[1913 Webster]