| cyclooxygenase | (n) either of two related enzymes that control the production of prostaglandins and are blocked by aspirin, Syn. Cox |
| cyclooxygenase-1 | (n) an enzyme that regulates prostaglandins that are important for the health of the stomach lining and kidneys, Syn. Cox-1 |
| cyclooxygenase-2 | (n) an enzyme that makes prostaglandins that cause inflammation and pain and fever, Syn. Cox-2 |