(Redirected from Glenoid). The glenoid cavity or glenoid fossa of scapula is a part of the shoulder. It is a shallow pyriform, articular surface, which is located on the lateral angle of the scapula.he humerus is held in place within the glenoid cavity by means of the long head of the bicep tendon. This tendon originates on the superior margin of the glenoid cavity and loops over the shoulder bracing humerus against the cavity.