- a variety of cinnamon derived from the cassia-bark tree.
- any of numerous plants, trees, and shrubs belonging to the genus Cassia, of the legume family, several species of which yield medicinal products.
- the pods of Cassia fistulosa, a tree widely cultivated as an ornamental.
- the pulp of these pods, used medicinally and as a flavoring.
- any plant of the mainly tropical leguminous genus Cassia, esp C. fistula, whose pods yield cassia pulp, a mild laxative
- a lauraceous tree, Cinnamomum cassia, of tropical Asia
- the cinnamon-like bark of this tree, used as a spice
