This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A triangular bone made up of five fused vertebrae and forming the posterior section of the pelvis.

n. A large triangular bone located at the base of the spine between the two hipbones of pelvis and formed from fused vertebrae.

n. That part of the vertebral column which is directly connected with, or forms a part of, the pelvis.

n. A compound bone resulting from the ankylosis of two or more vertebræ between the lumbar and the coccygeal region of the spine, mostly those which unite with the ilia; the os sacrum.

n. 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

"Next, bring your attention to your sacrum, which houses your sacred sexual energies and is the root of your psychophysical structure the word sacrum means “sacred place” in Latin."

os    bone   

lateral masses of the sacrum    curve of the sacrum    promontory of the sacrum    cornua of the sacrum   

sacra   

sacral   

coccyx    perineum    sternum    iusti    pelvis    mideyebrow    ense    femur    spine    collarbone