| | Conditions Treatments | Gynecological Disorders What is the medical definition of sex? Sex is defined by the medical field as the classification of living things based on their reproductive organs. Gynecological Disorders - Related Articles Muscular Back Pain How to Order Eyeglasses What Are the Causes of Low Blood Platelets in Men? How to Change a Menstrual Cycle With Birth Control Pills Eye Exercise Games Treatment for Pediatric Leukemia What will happen if you put mouthwash in your hair?