The series of vertebrae, separated by disks, that encloses and protects the spinal cord, and runs down the middle of the back in vertebrate animals.
Courage, fortitude, or strength.
Any fundamental support, structure, or infrastructure.
A caudal vertebra.
Toward the tail end (hind end) of the body; in bipeds such as humans, this direction corresponds to inferior.
Pertaining to the tail or posterior or hind part of a body.