CORTEX • DICTIONARY ONE.COM • Definition of Cortex

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/kˈɔrtɛks/ Listen

Cortex

noun

(pl. cortices)

The layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum. Synonyms: cerebral cortex, cerebral mantle, pallium.

The tissue forming the outer layer of an organ or structure in plant or animal.

The tissue that surrounds the lens nucleus. Synonym: lens cortex.

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Etymology of 'Cortex'

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"Cortex" Quotes from Famous Books

... spirally-coiled thread of protoplasm, furnished at one end with a pair of cilia. It much more resembles the antherozoids of Bryophyta and certain Pteridophyta than any known among other algae. The fertilized egg charged with food reserves rests for a considerable period, surrounded by its cortex, the whole having assumed a reddish-brown colour. On germination it gives rise to a row of cells in which short (nodal) and long (internodal) cells alternate. From the first node arise rhizoids; from ...

— Project Gutenberg Encyclopedia

... leaf, and of the new bud in its bosom, be cut away slice by slice. The seven ribs of the last year's leaf will be seen to have arisen from the pith in seven distinct points making a curve; and the new bud to have been produced in their centre, and to have pierced the alburnum and cortex, and grown without the assistance of a mother. A similar process may be seen on dissecting a tulip-root in winter; the leaves, which inclosed the last year's flower-stalk, were not necessary for the flower; but each of these was the father of a new bud, which may be now found at ...

— Zoonomia, Vol. I - Or, the Laws of Organic Life • Erasmus Darwin

Words linked to "Cortex" : medulla, neopallium, grey matter, crystalline lens, grey substance, parietal lobe, animal tissue, lens of the eye, occipital lobe, paleocortex, cerebrum, Golgi cell, plant tissue, frontal lobe, neural structure, gray matter, Golgi's cell, cortical, gray substance, cortical region, prefrontal lobe, temporal lobe, substantia grisea, lens cortex, archipallium, lens, cortical area