这个词是什么意思？
Five fused VERTEBRAE forming a triangle-shaped structure at the back of the PELVIS. It articulates superiorly with the LUMBAR VERTEBRAE, inferiorly with the COCCYX, and anteriorly with the ILIUM of the PELVIS. The sacrum strengthens and stabilizes the PELVIS.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D012447 · MeSH 2026。
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