bone element fused sacrum http://upload.wikimedia.org/wikipedia/commons/e/ec/Gray95.png sacrum [sacral vertebrae I - V] OpenCyc:Mx4rvmBKnJwpEbGdrcN5Y29ycA sacral bone the AAO class 'sacrum' is deliberately placed under 'sacral vertebra' rather than here CALOHA:TS-2201 A collection of sacral vertebrae in the sacral region that are fused and part of the bony pelvis. GAID:241 EFO:0003071 NCIT:C33508 galen:Sacrum sacral MESH:D012447 os sacrum os sacrum [vertebrae sacrales I - V] uberon UBERON:0003690 sacrum FMA:16202 sacrum [sacral vertebrae I-V] abdominal segment bone bone of dorsum pelvic region element subdivision of vertebral column