Cinnamon oil is a versatile essential oil extracted from the bark of the cinnamon tree. This oil has a warm, spicy aroma, which makes it a popular fragrance in the perfume industry. Cinnamon oil is also used widely in the culinary world for its sweet and aromatic flavor. Some synonyms that are associated with cinnamon oil are cassia oil, which is derived from the same tree species; cinnamon bark oil, which comes from the bark of the tree; and Cinnamomum zeylanicum oil, which is a scientific term denoting cinnamon oil's botanical name. Cinnamon oil is also commonly referred to as Ceylon cinnamon oil or true cinnamon oil.