The semilunar cartilage is a crucial structure located in the knee. It is also commonly known as the meniscus, which means crescent-shaped. The semilunar cartilage has two parts, medial and lateral, and it acts as a cushion between the thigh bone and the shinbone. Other synonyms for semilunar cartilage are knee meniscus, fibrocartilage meniscus, and articular disc. The knee meniscus is responsible for absorbing shock, distributing weight, and helping with joint stability. It is vulnerable to injuries such as tears and can cause issues like pain, swelling, and difficulty moving the knee joint. Therefore, it is essential to recognize its important role and seek medical attention if needed.