A cell that forms the lining of the fluid-filled spaces in the brain and spinal cord. It is a type of glial cell.
Cells that line cavities in the central nervous system considered to be a type of glial cell. ... (18 Nov 1997) ... 
Type: Term Definitions: 1. a cell of the simple cuboidal to low columnar epithelium lining the central canal of the spinal cord or one of the brain ventricles.