white matter white matter of spinal cord NCIT:C33893 SCTID:279436006 spinal cord white matter The regions of the spinal cord that are largely or entirely composed of myelinated nerve cell axons and contain few or no neural cell bodies or dendrites. MA:0000910 UBERON:0002318 substantia alba medullae spinalis spinal cord white substance spinal cord white matter of neuraxis EMAPA:35795 FMA:83945 UMLS:C0458457 BAMS:SCwhite DHBA:146035088 uberon white matter of neuraxis of spinal cord white substance of spinal cord