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Noun sacrum has 1 sense
  1. sacrum - 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
    --1 is a kind of     bone, os
    --1 is a part of pelvis, pelvic girdle, pelvic arch, hip
    --1 has part: sacral vertebra
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