• WordNet 3.6
    • n choroid a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye
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Webster's Revised Unabridged Dictionary
    • a Choroid (Anat) resembling the chorion; as, the choroid plexuses of the ventricles of the brain, and the choroid coat of the eyeball.
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Century Dictionary and Cyclopedia
    • choroid Membranous, as a chorion; like or likened to the chorion, as an investing part or tunic: in anatomy, applied to several delicate, highly vascular membranes which invest certain parts, and to associated structures.
    • n choroid A delicate, highly vascular membrane forming one of the coats or tunics of the eyeball, lining the sclerotic, and lying between it and the retina, with which it is in contact by its inner surface. It is plaited in front to form the ciliary processes, ends in the ciliary ligament, and is of a dark-brown or blackish color from the abundance of pigment. Also called choroidea, and choroid coat or membrane. See cut under eye .
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Webster's Revised Unabridged Dictionary
gr. ; chorion + e'i^dos form


In literature:

There was a corresponding increase in the choroidal pigment of the eye.
"Darwin and Modern Science" by A.C. Seward and Others
These coats are the sclerotic, the choroid, and the retina.
"A Practical Physiology" by Albert F. Blaisdell
The secundina (choroid) 5.
"Gilbertus Anglicus" by Henry Ebenezer Handerson
Take out both the lens and the iris and the choroid coat of the eye will reproduce both.
"Preventable Diseases" by Woods Hutchinson
They are found in one or both of the lateral ventricles, enveloped in the folds of the choroid plexus.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
She suffered, we afterwards concluded, from choroidal tuberculosis.
"Glaucoma" by Various
The plexus choroides was pale.
"Cases of Organic Diseases of the Heart" by John Collins Warren
Tela choroides dark and gorged.
"North American Medical and Surgical Journal, Vol. 2, No. 3, July, 1826" by Various
The choroid coat will be recognized as the black layer lying subjacent to the sclerotic.
"Special Report on Diseases of Cattle" by U.S. Department of Agriculture
If the raised flap is carefully replaced upon the choroid, it regains its purple hue.
"The Galaxy, April, 1877" by Various
Its apex, where the two choroid plexuses blend with each other, lies just behind the anterior pillars of the fornix.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4" by Various
Four cases excluded (2 with choroiditis, 1 with congenital cataract, 1 with traumatic cataract).
"Schweigger on Squint" by C. Schweigger
Z, Zonule of Zinn, the ciliary ch, Choroid.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1" by Various
The plexus choroides were uncommonly pale.
"Observations on Insanity" by John Haslam
The plexus choroides were uncommonly pale.
"Observations on Madness and Melancholy" by John Haslam
Virchow found emboli of the retinal and choroidal vessels.
"A System of Practical Medicine by American Authors, Vol. I" by Various
It occupies the same position between the layer of rods and cones, or cones only, and the choroid.
"Old Flies in New Dresses" by Charles Edward Walker
It is found directly behind the iris and is attached to the choroid coat by means of delicate ligaments.
"A Civic Biology" by George William Hunter
They are sometimes the result of scrofula, and probably of other forms of choroiditis.
"The Catholic World. Volume II; Numbers 7, 8, 9, 10, 11, 12." by E. Rameur
Bergmeister's and my own observations on the vitreous humour clearly prove that this is derived from an ingrowth through the choroid slit.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour

In news:

My daughter (age 33) has been diagnosed with multifocal choroiditis in her left eye.
Pilocytic astrocytoma, medulloblastoma, choroid plexus papilloma.