gray matter

名词 gray matter:

1. greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons
   同义词：grey matter, grey substance, gray substance, substantia grisea

1. A group of specialized nerve cells or a localized mass of gray matter in the brain or spinal cord.
   神经核一组专门的神经细胞或存在于大脑或脊髓中灰物质的局部块