Assertion: cerebral cortex | /r/Synonym | gray matter
Facets:
value: due to its greyish appearance
type: CAUSE
Source sentences:
text: It is called gray matter because it is darker in color that the layer underneath.
text: The cerebral cortex is referred to as "gray matter.
text: The cerebral cortex is referred to as the grey matter due to its greyish appearance.
text: The cerebral cortex is the outer layer of the brain, called gray matter.