part of part of central nervous system gray matter A nervous system structure composed primarily of nerve cell bodies (somas). May also include dendrites and the initial unmyelinated portion of axons. AEO:0001012 EHDAA2:0003136 EHDAA2_RETIRED:0004658 FMA:67242 HBA:4006 MA:0001112 Multi-tissue comprised of neurons, dendrites, axon terminals, glial cells, and capillaries.[TAO] OpenCyc:Mx4rwDdKMpwpEbGdrcN5Y29ycA TAO:0002197 UBERON:0002020 UMLS:C0018220 VHOG:0001768 ZFA:0001681 gray mater gray matter gray matter of neuraxis grey matter grey matter of neuraxis grey substance grisea neuronal grey matter substantia grisea uberon central nervous system cell part cluster