saddle joint
noun
: a joint (as the carpometacarpal joint of the thumb) with saddle-shaped articular surfaces that are convex in one direction and concave in another and that permit movements in all directions except axial rotation
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“Saddle joint.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/saddle%20joint. Accessed 26 Nov. 2024.
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