No the Cortex is the outer layer of a internal organ, a cerebal cotex is, specificly, the outer layer of the brain which contains grey matter and neurons....but after saying that, a Cortex is a outer casing in general
The cerebral cortex is the outermost covering of the brain. It is approximately 2-4 mm in thickness. It contains the frontal, temporal, parietal and occipital lobes.
In short, the cerebral cortex is the outer and largest part of the brain, that covers its smaller parts and is usually easily visible on brain illustrations. It contains gray matter (neurons)...