Sacral a. : Of or pertaining to the sacrum; in the region of the sacrum.

Example:
How to open Sacral chakra completely?

Taxonomy
sacrum, bone, os sacrum, free encyclopedia, coccyx, Female Pelvis, triangular bone, base of the sacrum, sagittal section, ala of sacrum, sacral canal, spinous processes, foramina, hip bone, pelvis, lumbar vertebra, vertebrae, obliquely.

Defination from the web:
sacral promontory internally, and articulates with the last lumbar vertebra to form the prominent sacrovertebral ... The vertebral canal (canalis sacralis; sacral canal) runs throughout the greater part of the bone; above, it is triangular in form; below, its ...