cortex


cor·tex

noun \ˈkr-ˌteks\

medical : the outer layer of an organ in the body and especially of the brain

plural cor·ti·ces \ˈkr-tə-ˌsēz\ or cor·tex·es

Full Definition of CORTEX

1
a (1) :  the outer or superficial part of an organ or bodily structure (as the kidney, adrenal gland, or cerebellum or a bone); especially :  cerebral cortex (2) :  the proteinaceous usually pigmented layer of a hair below the cuticle
b :  the outer part of some organisms (as paramecia)
2
:  a plant bark or rind (as cinchona) used medicinally
3
a :  the typically parenchymatous layer of tissue external to the vascular tissue and internal to the corky or epidermal tissues of a green plant; broadly :  all tissues external to the xylem
b :  an outer or investing layer of various algae, lichens, or fungi

Origin of CORTEX

Latin cortic-, cortex bark — more at cuirass
First Known Use: 1677

cor·tex

noun \ˈkr-ˌteks\   (Medical Dictionary)
plural cor·ti·ces \ˈkrt-ə-ˌsēz\ or cor·tex·es

Medical Definition of CORTEX

1
a : the outer or superficial part of an organ or body structure (as the kidney, adrenal gland, or a hair); especially : cerebral cortex b : the outer part of some organisms (as paramecia)
2
a : a plant bark or rind (as cinchona) used medicinally b : the peel of any of several fruits—used especially in the writing of medical prescriptions

Illustration of CORTEX

cortex

noun    (Concise Encyclopedia)

In plants, the tissue of unspecialized cells lying between the epidermis (surface cells) and the vascular, or conducting, tissues (see phloem and xylem) of stems and roots. Cortical cells may contain stored food or other substances, such as resins, latex, essential oils, and tannins. Cortical cells in herbaceous stems, young woody stems, and stems of succulents contain chloroplasts and can therefore make food by photosynthesis. Food, usually in the form of starch, in edible roots, bulbs, and tubers is stored mostly in the cortex.

Browse

Next Word in the Dictionary: cortez
Previous Word in the Dictionary: cortege
All Words Near: cortex

Seen & Heard

What made you want to look up cortex? Please tell us where you read or heard it (including the quote, if possible).