saddle joint

saddle joint definition - medical

saddle joint

noun
A biaxial joint in which the double motion is effected by the opposition of two surfaces, each of which is concave in one direction and convex in the other, as in the carpometacarpal articulation of the thumb.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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