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

"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

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

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

This fluid is produced by filtering blood at the choroid plexuses in the four ventricles of the brain.

From Textbooks • Jun. 19, 2013

It occupies the same position between the layer of rods and cones, or cones only, and the choroid.

From Old Flies in New Dresses How to Dress Dry Flies with the Wings in the Natural Position and Some New Wet Flies by Walker, Charles Edward