choroid

American  

[kawr-oid, kohr-] / ˈkɔr ɔɪd, ˈkoʊr- /

Also choroidal,

adjective

1. like the chorion; membranous.

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noun

1. choroid coat.

choroid British  

/ ˈkɔːrɔɪd, ˈkɔːrɪˌɔɪd /

adjective

1. resembling the chorion, esp in being vascular

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noun

1. the brownish vascular membrane of the eyeball between the sclera and the retina

choroid Scientific  

/ kôr′oid′ /

1. The dark-brown vascular coat of the eye between the sclera and the retina.

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1. Resembling the chorion; membranous.

2. Relating to or involving the choroid of the eye.

Other Word Forms

• prechoroid
  adjective
• subchoroid
  adjective
• subchoroidal
  adjective

Etymology

Origin of choroid

1625–35; < Greek choroeidḗs false reading for chorioeidḗs chorioid

Example Sentences

Uveitis is a rare inflammatory disease of the choroid of the eye, which lies between the retina and the sclera.

From Science Daily • Apr. 25, 2024

"Depending on the wavelength used, the autofluorescence signal from the retina and choroid can differ significantly. Depending on the excitation wavelength, lesions can be imaged at different depths and therefore in different areas," explains Mauschitz.

From Science Daily • Apr. 25, 2024

They focused on a small region called the choroid plexus, which is known as a major conduit of immune cells into the brain.

From Science Daily • Jan. 3, 2024

The choroid plexus is a specialized structure in the ventricles where ependymal cells come in contact with blood vessels and filter and absorb components of the blood to produce cerebrospinal fluid.

From Textbooks • Jun. 19, 2013

On the deep surface of the choroid is a structureless basal lamina.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" by Various