Medical Definition of cortex
plural cortices \ˈkȯrt-ə-ˌsēz\play or cortexes
1a: the outer or superficial part of an organ or body structure (as the kidney, adrenal gland, or a hair); especially : cerebral cortexb: the outer part of some organisms (as paramecia)
2a: a plant bark or rind (as cinchona) used medicinallyb: the peel of any of several fruits—used especially in the writing of medical prescriptions
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