Oil of clove, also known as clove oil, is an oil extracted from the clove plant, Syzygium aromaticum. Clove oil is commonly used in aromatherapy and for flavoring food and some medicines. clove oil has been used for easing digestive upset, relieving pain, and helping with respiratory conditions. Research has found that clove oil may have benefits for dental and topical applications, for treating infections, and even fighting cancer.