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Noun: sacrum (sacra,sacrums)  sa-krum or sey-krum
  1. Wedge-shaped bone consisting of five fused vertebrae forming the posterior part of the pelvis; its base connects with the lowest lumbar vertebra and its tip with the coccyx

Derived forms: sacra, sacrums

Type of: bone, os[2]

Part of: hip, pelvic arch, pelvic girdle, pelvis

Encyclopedia: Sacrum