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

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

Winger Carl Hagelin, who was hit in the left eye with a stick blade during practice March 1, ruptured the choroid in the back of his eye and had two surgeries.

From Washington Post

Hagelin has been out since taking a teammate’s errant stick to his left eye in practice March 1, rupturing the choroid so badly doctors considered removing it.

From Seattle Times

It forms a barrier to blood vessels in the choroid and mops up harmful substances that are shed by photoreceptors in response to light.

From Nature