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A highly vascular membrane in the eye between the retina and the sclera
Answer for the clue "A highly vascular membrane in the eye between the retina and the sclera ", 7 letters:
choroid
Word definitions for choroid in dictionaries
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
1680s, from Latinized form of Greek khoroeides , a corruption of khorioeides , from khorion (see chorion ) + eidos "resemblance" (see -oid ).
Wiktionary
Word definitions in Wiktionary
n. (context anatomy English) The vascular layer of the eye lying between the retina and the sclera.
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Choroid \Cho"roid\, a. [gr. ?; ? chorion + e'i^dos form.] (Anat.) resembling the chorion; as, the choroid plexuses of the ventricles of the brain, and the choroid coat of the eyeball. -- n. The choroid coat of the eye. See Eye . Choroid plexus (Anat.), ...
WordNet
Word definitions in WordNet
n. a highly vascular membrane in the eye between the retina and the sclera [syn: choroid coat ]
Wikipedia
Word definitions in Wikipedia
The choroid , also known as the choroidea or choroid coat , is the vascular layer of the eye , containing connective tissue , and lying between the retina and the sclera . The human choroid is thickest at the far extreme rear of the eye (at 0.2 mm), while ...
Usage examples of choroid.
This includes difficulties in memory, speech, and coordination, due to brain oxygen starvation in the orbital gyri of both frontal lobes, as well as the cerebral choroid plexus.
In these cases the lesions have consisted of detachment of the retina, optic atrophy, cataract, hemorrhages into the retina, and rupture of the choroid, paralysis of the oculomotor muscles, and paralysis of the optic nerve.
All around its rim is a ringlike suspensory ligament, which joins it to a portion of the choroid layer immediately behind the iris.
It may even be several minutes before the field of vision really appears black, that is, before the activity of the inner light in the choroid has so far died away that equilibrium prevails between the non-stimulated nerves and the non-stimulated blood.
Just as the nerve processes arising in the retina are continued to the optic centre in the cerebrum, so must we look for the origin of the corresponding blood process not in the choroid itself, but in the lower regions of the organism.
What we call 'seeing' is far more the result of an interplay between the retina carrying the nerves, and the choroid carrying the blood-vessels.