A trochoid joint, also known as a pivot joint, is a specialized type of joint found in the human body. It allows rotational movement around a central axis, resembling the turning motion of a doorknob. Synonymous terms for trochoid joint include the pivot joint, rotary joint, and rotational joint. These joints are primarily located in the neck, where they enable the skull to rotate freely on the top vertebrae. Additionally, trochoid joints are found in the forearm, enabling the rotation of the radius bone around the ulna. These joints play a crucial role in fluid and seamless movements, allowing us to perform a range of activities requiring rotation, such as twisting or turning movements.