sigmoid cavity

noun

Definition of sigmoid cavity

: either of two articulatory surfaces in the elbow:
a : semilunar notch

called also greater sigmoid cavity

b : a surface on the inner side of the distal end of the radius for articulation with the ulna

called also lesser sigmoid cavity

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Cite this Entry

“Sigmoid cavity.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/sigmoid%20cavity. Accessed 7 December 2019.

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