Carpal joint is the example of

The carpal joint is an example of a "condyloid" joint. This type of joint, also known as an ellipsoid joint, allows movement in two directions: flexion and extension (which is moving the hand up and down), and abduction and adduction (which is moving the hand side to side). This is possible due to the oval-shaped end of one bone fitting into a similarly oval-shaped hollow of another bone. Other examples of this type of joint include the wrist joint and the metacarpophalangeal joints (the joints between the metacarpal bones and the phalanges of the fingers).