Rotary Joint (Noun)
Meaning
A freely moving joint in which movement is limited to rotation; "the articulation of the radius and ulna in the arm is a pivot joint".
Classification
Nouns denoting body parts.
Examples
- The forearm rotates as a single bony unit around a rotary joint connecting the proximal radioulnar bones to the humerus.
- A rotary joint located between the occipital bone and the atlas allows limited rotating of the head.
- The hand flopped limp due to a paralyzed rotary joint from the injury.
- In a typical turtle shell, ribs are fused with the neighboring vertebrae as well as the sternum to form a flat plate, turning a rotary joint between the sacral vertebrae into a fused sacrum.
- In the case of other flutes, a ball, pivot pin, or long-axial rotary joint may have been substituted to achieve an easier way to hold and play long flutes.