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sacro-sciatic
sacro-sciatic adj.
Brit. 
/ˌseɪkrə(ʊ)sʌɪˈatɪk/
, /ˌseɪkrə(ʊ)sʌɪˈatɪk/U.S. /ˌseɪkroʊˌsaɪˈædɪk/
/ˌseɪkroʊˌsaɪˈædɪk/ΚΠ
1753 Chambers's Cycl. Suppl. Sacro-sciatic ligaments... The small sacro-sciatic, or internal sciatic ligament.
1782 Monro's Anat. Human Bones (new ed.) 146 Two strong ligaments which are extended to the os ischium; and are therefore called sacro-sciatic.
1893 A. S. Eccles Sciatica 55 The cause of obstinate sacro-sciatic tenderness.
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