noun, plural diarthroses [dahy-ahr-throh-seez] . Anatomy.
a form of articulation that permits maximal motion, as the knee joint.

1570–80; < Neo-Latin < Greek; see di-3, arthrosis

diarthrodial [dahy-ahr-throh-dee-uhl] , adjective
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World English Dictionary
diarthrosis (ˌdaɪɑːˈθrəʊsɪs)
n , pl -ses
anatomy any freely movable joint, such as the shoulder and hip joints
[C16: New Latin, from di-² + Greek arthrōsis, from arthroun to fasten by a joint, from arthron joint]

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Medical Dictionary

diarthrosis di·ar·thro·sis (dī'är-thrō'sĭs)
See movable joint.

The American Heritage® Stedman's Medical Dictionary
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