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saddle joint

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noun Masonry.
  1. (on a sill, coping, or the like) a vertical joint raised above the level of the washes on each side.
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Origin of saddle joint

First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

saddle joint in Medicine

saddle joint

n.
  1. 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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.