ball-and-socket joint

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Related to Ball and socket joint: gliding joint, hinge joint, pivot joint

ball-and-socket joint,

in engineering, mechanical connection used between parts that must be allowed some relative angular motion in nearly all directions. As the name implies, the joint consists essentially of a spherical knob at the end of a shaft, with the knob fitting securely into a mating socket. Like other mechanical joints, a ball-and-socket joint must have some provision for lubrication and is normally provided with a seal to prevent loss of the lubricant. Joints of this type are commonly used in mounting the front wheels of automobiles, allowing these wheels movement sufficient for steering. In this application they are usually called ball joints.

ball-and-socket joint

[¦bȯl ən ′säk·ət ‚jȯint]
(anatomy)
(geology)
(mechanical engineering)
A joint in which a member ending in a ball is joined to a member ending in a socket so that relative movement is permitted within a certain angle in all planes passing through a line. Also known as ball joint.

ball-and-socket joint

, ball joint
1. a coupling between two rods, tubes, etc., that consists of a spherical part fitting into a spherical socket, allowing free movement within a specific conical volume
2. Anatomy a bony joint, such as the hip joint, in which a rounded head fits into a rounded cavity, allowing a wide range of movement
References in periodicals archive ?
Resurfacing uses an all-metal ball and socket joint (more durable than the plastic socket used in total hip replacement), so the device is expected to be longer lasting.
When it comes to twisting movements, the ball and socket joint is the king.
The hip joint consists of a ball and socket joint. The top of the thighbone (femur) is a largest bone of human body, called femur joins with the horizontal pelvic coxal bone and lower end of that is fixed at the knee.
The joint, which lies directly in back and below the fingers, is a ball and socket joint, and the leg rotation originates from there.