noun Pathology.
- a protrusion of the meninges through an opening in the skull or spinal column, forming a bulge or sac filled with cerebrospinal fluid.
noun
- pathol protrusion of the meninges through the skull or backbone
n.
- Protrusion of the meninges of the brain or spinal cord through a defect in the skull or spinal column forming a cyst filled with cerebrospinal fluid.