gray matter

Từ điển WordNet v3.1 - WordNet Dictionary

noun

greyish nervous tissue containing cell bodies as well as fibers;
forms the cerebral cortex consisting of unmyelinated neurons
• Syn:
grey matter, grey substance, gray substance, substantia grisea
• Hypernyms:
nervous tissue, nerve tissue
• Substance Holonyms:
cerebral cortex, cerebral mantle, pallium, cortex
• Substance Meronyms:
neuropil, neuropile