Rotary joint

Definition
noun, plural: rotary joints
A synovial joint in which a section of a cylinder of one bone fits into a corresponding cavity on the other, permitting rotating motion.
Supplement
Example is the joint in human head on the neck where rotating motion is possible. Other examples are those found in the forearms, knees and other parts of the skeletal system that are capable of rotating.
Synonyms:

trochoid joint
articulatio trochoidea
helicoid ginglymus
lateral ginglymus
trochoid articulation
trochoid joint

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