"Synovial" refers to a type of joint in the body that allows for smooth movement. These joints are characterized by a fluid-filled space called the synovial cavity, which is lined by a membrane that produces synovial fluid. This fluid lubricates the joint, reducing friction and helping to absorb shock during movement. Common examples of synovial joints include the knee, elbow, and shoulder. These joints enable a wide range of motion, making activities like walking, bending, and lifting possible. The structure of synovial joints is designed to support both stability and flexibility in the body.