synovial syn·ovial / saiˈnəuviəl; <ʃOŋð color="#ˌdˌdˌd">siˈn-; <ɪ style="color:#62081f">ŋæmə <ʃOŋð color="#ˌdˌdˌd">siˈnou- / adjective(biology 生) (of a joint 关节) having a membrane(=a piece of very thin skin) containing liquid between the bones, which allows the joint to move freely (含)滑膜的