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cortex

cor·tex

cortex

 
pronunciation:
kor teks
part of speech: noun
inflections: cortexes, cortices
definition 1: the outer layer of an organ or other body part such as the kidney or the adrenal gland.
definition 2: the outer layer of the brain.
definition 3: the layer of the bark or stem of a tree or plant that lies between the vascular tissue and the epidermis.