choroid

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choroid

 [kor´oid]
the middle, vascular coat of the eye, between the sclera and the retina. adj., adj choroid´al. It contains an abundant supply of blood vessels and a large amount of brown pigment that serves to reduce reflection or diffusion of light when it falls on the retina. Adequate nutrition of the eye is dependent upon blood vessels in the choroid.

cho·roid

(kor'oyd), [TA]
Portion of the middle or vascular layer of the eyeball lying between the pigment epithelium and the sclera and posterior to the other parts of the vascular layer, the ciliary body, and iris.
Synonym(s): choroidea [TA]
[G. choroeidēs, a false reading for chorioeidēs, like a membrane]

choroid

/cho·roid/ (ko´roid)
1. the middle, vascular coat of the eye, between the sclera and the retina.choroid´al
2. resembling the chorion.

choroid

(kôr′oid′) or

chorioid

(kôr′ē-oid′)
n.
The dark-brown vascular coat of the eye between the sclera and the retina. Also called choroid coat, choroid membrane.
adj.
1. Resembling the chorion; membranous.
2. Of or relating to the choroid.

choroid

[kôr′oid]
Etymology: Gk, chorion + eidos, form
a vascular layer of tissue between the retina and the sclera of the eye that supplies blood to the outer retina.

choroid

noun The highly vascularised and pigmented nutrient middle layer of the eye, located between retina and sclera (the tapetum is an iridescent layer in the choroid of some eyes); part of the uvea.

cho·roid

(kōr'oyd) [TA]
The middle vascular tunic of the eye lying between the retina and the sclera.
Synonym(s): choroidea [TA] .
[G. choroeidēs, a false reading for chorioeidēs, like a fetal membrane]

choroid

The densely pigmented layer of blood vessels lying just under the retina of the eye, contributing to its fuel and oxygen supply and optical efficiency.

choroid

  1. a layer behind the retina of the vertebrate eye which contains blood vessels and pigment.
  2. resembling the CHORION.

Choroid

The part of the uveal tract behind the ciliary body. The choroid underlies and nourishes the retina and absorbs scattered light.
Mentioned in: Uveitis

choroid

the middle, vascular coat of the eye, between the sclera and the retina.
It contains an abundant supply of blood vessels and a large amount of brown pigment which serves to reduce reflection or diffusion of light when it falls on the retina. Adequate nutrition of the eye is dependent upon blood vessels in the choroid. See also tapetum, lamina cribrosa, lamina basilaris, vascular lamina.

choroid ependyma
the ependymal cells which embrace choroid vessels to make up the choroid plexus.
choroid inflammation
choroid plexus
see choroid plexus.