Is “Cortex” a Scrabble word?
Yes
CORTEX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Cortex
/ˈkɔːtɛks/
noun
1.The outer layer of an internal organ or body structure, such as the kidney or the brain.
2.The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue.