Cascarilla

noun

1. A tropical shrub or tree (Croton eluteria) native to the West Indies and northern South America, having a bark that yields an aromatic spicy oil used as a flavoring and fragrance.
2. The bark of this plant.
3. A euphorbiaceous West Indian shrub (Croton eleutheria).
4. The aromatic bark of this shrub, formerly used as a gentle tonic or mixed with tobacco for smoking.