choroid

noun
cho·​roid | \ ˈkȯr-ˌȯid How to pronounce choroid (audio) \
variants: or less commonly chorioid \ ˈkȯr-​ē-​ˌȯid How to pronounce chorioid (audio) \

Definition of choroid

: a vascular membrane containing large branched pigmented cells that lies between the retina and the sclera of the vertebrate eye

called also choroid coat

— see eye illustration

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Other Words from choroid

choroid or choroidal \ kə-​ˈrȯi-​dᵊl How to pronounce choroidal (audio) \ adjective

Examples of choroid in a Sentence

Recent Examples on the Web

The condition, known technically as birdshot chorioretinopathy, causes severe, progressive inflammation of the retina and the choroid, the vascular layer of the eye. Caren Chesler, Popular Mechanics, "A Vision Quest," 6 Mar. 2019 Nightstar, a gene therapy company based in the U.K., has been undergoing clinical trials to address choroideremia, a mutation in the CHM gene that leads to degeneration of the choroid (Misrok’s vision is affected by choroid damage). Caren Chesler, Popular Mechanics, "A Vision Quest," 6 Mar. 2019 Behind the retina is a part of the eye called the choroid. sandiegouniontribune.com, "6 facts about your eyes," 20 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'choroid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of choroid

1683, in the meaning defined above

History and Etymology for choroid

New Latin choroides resembling the chorion, from Greek chorioeidēs, from chorion chorion

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Dictionary Entries near choroid

choro-

chorogi

chorography

choroid

chorologic

chorology

Chorotega

Statistics for choroid

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Time Traveler for choroid

The first known use of choroid was in 1683

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More Definitions for choroid

choroid

noun
cho·​roid | \ ˈkō(ə)r-ˌȯid, ˈkȯ(ə)r- How to pronounce choroid (audio) \
variants: also chorioid \ ˈkōr-​ē-​ˌȯid, ˈkȯr-​ How to pronounce chorioid (audio) \

Medical Definition of choroid

: a vascular membrane containing large branched pigment cells that lies between the retina and the sclera of the eye

called also choroid coat

Other Words from choroid

choroid or choroidal \ kə-​ˈrȯid-​ᵊl How to pronounce choroidal (audio) \ adjective

More from Merriam-Webster on choroid

Britannica.com: Encyclopedia article about choroid

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