| sacro-, sacr- (Latin: bone at the lower end of the spine; os sacrum, "sacred bone").So called because it was thought never to disintegrate; the triangular bone just below the lumbar vertebrae, usually formed by five fused vertebrae [sacral vertebrae] that are wedged dorsally between the two hip bones. sacrad: sacral: sacralgia: sacrarthrogenic: sacrectomy: sacroanterior: sacroccygeal: sacrococcyx: sacrocoxalgia: sacrocoxitis: sacrodynia: sacroiliac: sacroilitis: sacrolumbar: sacroposterior: sacrotomy: sacrovertebral: sacrum: |