Memory Game medical terminology word rootOnline version to know more about root words in skeletal system by mohamed said -rachi- -lumb- -crani- -sacr- Sacrum Cranium Relating to the lumbar region of the spine Vertebral spine, vertebral column -petr- Relating to the petrous portion of the temporal bone Sternum, breastbone Vertebra, spine, vertebral column Clavicle, collarbone -cost- -pelv/i- Ribs -clavic- / -clavicul- Pelvis, pelvic bone -spondyl- / - vertebr- -stern-