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

... of the left occipital cortex in the cuneate lobe and the neighbourhood of the calcarine fissure. The speech suggests a slight ...

— Surgical Experiences in South Africa, 1899-1900 • George Henry Makins

... shall again have occasion to mention in dealing with his own contributions to the kind. He writes: 'Theocritus Syracusanus Poeta, ut ab antiquis accepimus, primus fuit, qui Graeco Carmine Buccolicum escogitavit stylum, verum nil sensit, praeter quod cortex verborum demonstrat. Post hunc Latine scripsit Virgilius, sed sub cortice nonnullos abscondit sensus, esto non semper voluerit sub nominibus colloquentium aliquid sentiremus. Post hunc autem scripserunt et alii, sed ignobiles, de quibus nil curandum est, excepto inclyto Praeceptore ...

— Pastoral Poetry and Pastoral Drama - A Literary Inquiry, with Special Reference to the Pre-Restoration - Stage in England • Walter W. Greg