What does "cinnamon" mean?

Cinnamon: (a) The inner bark of the shoots of Cinnamomum Zeylanicum, a tree growing in Ceylon. It is aromatic, of a moderately pungent taste, and is one of the best cordial, carminative, and restorative spices. (b) Cassia. Cinnamon stone (Min.), a variety of garnet, of a cinnamon or hyacinth red color, sometimes used in jewelry. -- Oil of cinnamon, a colorless aromatic oil obtained from cinnamon and cassia, and consisting essentially of cinnamic aldehyde, C6H5.C2H2.CHO. -- Wild cinnamon. See Canella.