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| sac·ro·il·i·ac [ sàkrō íllee àk ] |
adjective |
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| Definition: |
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relating to sacrum and ilium: relating to the sacrum and the upper portion of the hip bone ilium, or to the joint between the sacrum and ilium
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noun (plural sac·ro·il·i·acs) |
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| Definition: |
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joint where sacrum and ilium meet: the joint in the back where the sacrum and the ilium meet
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| [Mid-19th century. <sacrum] |
