sacral

This term is strictly clinical and anatomical. It evokes a precise medical image of the pelvic structure and the fusion of vertebrae that support the weight of the upper body. It is used almost exclusively by healthcare professionals, physiotherapists, and anatomists in a sterile, descriptive manner. While it shares a root with the word sacred, in modern usage, sacral is devoid of spiritual or religious connotation. Using it in a non-medical context would be an error, as it refers to a physical bone rather than a holy status.